What's on your Brain.

Objectivity affects what force, before Subjectivity is manifest?

Netscape Navigator 9 for the Web Developer:
Compatible Extensions

Quick reference / recap of those extensions which i found while browsing the extensive list of add-ons at addons.mozilla.org

Essentially, this is not only a record of what i’m adding to Netscape, but also a record of what i’ve found to be my most favourite extensions lately.

Handy Extra Stuff
Adds some handy extra toolbar and other functionality to Firefox, including: Custom webpage source viewer button + configuration dialog, Toggle online/offline button, Tabbar customization UI, Copy ALT/TITLE text menu options, Popup ALT text option.
View Source Choice
Imitation is the sincerest form of flattery.

View Page Source in a variety of contexts.

FireCal aims to be a comprehensive calculator suite. As of now it contains:

  • Colour Picker and Converter
  • Body Mass Index
  • Daily Energy Requirement
  • Currency Conversion (source: Federal Reserve Bank of NewYork)
  • Compound Interest – Calculates Principal,Interest Rate,Period & Balance
  • Temperature
  • Wind Chill
  • High Precision Basic Calculator (In Approval Queue
PHPdebugger 0.3

A debugging toolbar
for use with servers running DBG. Enable debugging of the current page,
the next page, next form submit or the whole session from a toolbar

debugging toolbar for use with servers running DBG. Enable debugging of
the current page, the next page, next form submit or the whole session
from a toolbar menu.

Make sure you have DBG running successfully on your web server and the
listener running on your local machine before using the toolbar, then
add URLs of sites you can DBG into the options menu (one per line)

InspectThis 0.2.9

Inspect the current element with the DOM Inspector*.

Adds an entry to the context menu to open the DOM Inspector on the selected element.

Ideal for AJAX, DHTML and JavaScript work.

* Please note that the DOM Inspector must be installed. (Select
"Developer Tools" during custom setup of Firefox)

Custom Buttons

Gives a possibility to create custom toolbarbuttons.

To add new button you should:

* Go into menu View -> Add new Button….

* Fill in the fields Name and Code.

(You can leave the field Image empty. Then the button will have a standart image).

* The Initialization code executes once a time when the browser startups. You can leave it empty too.

* Go into menu View -> Toolbars -> Customize… , find new button and drag it to any toolbar.

The extension adds to Firefox a "custombutton" protocol, that allows to
install buttons from web-pages. Many useful buttons can be found at

Discussion (in English):


Discussion (in Russian): http://forum.mozilla.ru/viewtopic.php?id=9591

Anonymouser 0.3.1

­Developer Comments



11-2-06 Updated max version as others have told me it works. If you
have problems please visit the extension’s homepage to let me know.



Usage: Install, Restart Browser

Right click a link (Must be "http://" type link) and
select "Open with Anonymouser" or "Open with
Anonymouser in New Tab"

Will open… unfortunately with an advertisement. You can use greasemonkey and one of my scripts found here:


This will be the last update for this extension.

If anybody would like to continue to develop this extension then please
feel free to. All I ask is that I am kept on the main developer list in
the "About" and given credits on the new homepage.


See homepage for more information:


Version 0.3.1 — January 10, 2006 — 6 KB

Updated to work with 1.5 (as well as old versions)

This will be the last update for this extension.

Also if you want to remove the ad automatically then you can use greasemonkey and a script for it can be found at my other site:

Header Monitor
Statusbar with HTTP response header monitor.

This is Firefox extension for display on statusbar panel any HTTP response header of top level document returned by a web server. Example: Server (by default), Content-Encoding, Content-Type, X-Powered-By and others.

Important: This extension obtains headers from LiveHTTPHeaders. Therefore, in order to use HeaderMonitor first install extension LiveHTTPHeaders from http://livehttpheaders.mozdev.org/installation.html

LinkChecker 0.6.1

Check the validity of links on any webpage.

Works with:

  • Firefox Firefox:
    1.5 – 2.0.0.*

Developer Comments

There’s also a toolbar button that can be added for easier access to
LinkChecker. Just right click on your toolbar, choose
"Customize" and look for the button with the
underlined blue check.

Version 0.6.1 — October 3, 2006 — 36 KB

includes ability to check selected links, avoid checking links on an
customizable keyword exclusion list, and adjustable link highlight

Adblock Plus: Element Hiding Helper 1.0.1

Fight the text ads!
Element Hiding Helper is a companion extension for Adblock Plus meant
to make creating element hiding rules easier.

simply select the element you want to be hidden and then choose which
attributes of this element should be taken into account when hiding it
in future. The element hiding rule is generated and added automatically.

Extension Manager Extended 2.6
Use the Addon Manager to view the id, date installed, and the folder of an extension or theme. Check http://extended.spanglerco.com for more information and http://firefox.spanglerco.com for more extensions.

Change log and known bugs can be found at http://extended.spanglerco.com/log.txt

View Dependencies

View Dependencies adds a tab to the Page Info window, in which it lists
all the files which were loaded to show the current page.

It orders the files by servers and by types (image, stylesheet, script,
…). The size of each file, the total size per server and the total
page size are displayed.

With a context menu, you can open any file in a new tab or new window. You can also copy an url to the clipboard.

Make Link 3.0.2

Make HTML or ForumCode links via the context menu.

Fleck – Annotate the Web 1.1

Fleck allows you to add Notes and Bullets to websites. You can then share these annotated pages with other people.

After installation a small button will appear in your browser. Click that button when you visit a website and you will get a toolbar at the bottom of the page you are visiting.

Another small icon will show you if there are Annotated versions of the page you are currently visiting.

CSS validator 0.3.2

Validates a page using the W3C CSS Validator. Adds an option to the right-click context menu and to the Tools menu to allow for easy validation of the CSS of the current page. Opens the results in a new tab. Will only work on pages that have a CSS file associated. For example it will work with http://www.w3.org/ as the URL has a CSS file.

Page validator 0.3.2

Validates a page using the W3C Markup Validation Service. Adds an option to the right-click context menu and to the Tools menu to allow for easy validation of the current page. Opens the results in a new tab. This is a simple extension that will work only for online pages.

Note: The W3C Markup Validation Service now allows you to validate behind a site secured with HTAccess by allowing you to login for it.

Mac Only! Safari View
Safari View has a right click menu item to open a page in Safari and a list of sites to always open in Safari. It can close tabs automatically and you can select other browser.
Form Saver 0.7.0

Saves form field data as autofill-bookmarklets. Works with inputs, checkboxes, radio groups, textareas, and selects. As always, feel free to email me with suggestions or issues. I designed this because when testing a form, I hated filling in every option each time.

Save As Image 1.044

Adds the ability to save a page, frame, or part of either as an image.

Useful for showing people bugs in a website, creating a snapshot of design progress, or perhaps even creating a gallery of websites.

ViewSourceWith 0.0.9

The main goal consists to view page source with external applications but you can also…
– open page source as DOM document, read faq

  • – open CSS and JS files present on page
  • – open images using your preferred image viewer (e.g. GIMP or ACDSee)
  • – open PDF links with Acrobat Reader or Foxit Reader or what you prefer
  • – edit textboxes content with your preferred editor and automatically see modified text on browser when you re-switch focus on it, this simplifies wiki pages editing, read faq
  • – open server side pages that generate the browser content, this simplifies web developer’s debug, read server-faq
  • – open files listed in Javascript console. When editor open file the cursor can be moved to line number shown on javascript console, read js faq

For desperate cases you can add Microsoft IE to editor list.

Read faq at http://dafizilla.sourceforge.net/viewsourcewith/faq.php
Read server-faq at http://dafizilla.sourceforge.net/viewsourcewith/faq-serverpages.php
Read javascript console faq at http://dafizilla.sourceforge.net/viewsourcewith/faq-js.php

FireFTP 0.96.4

FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.

Along with transferring your files quickly and efficiently, FireFTP also includes more advanced features such as: directory comparison, syncing directories while navigating, SSL encryption, file hashing, and much more!

PageDiff 1.1

Pagediff is a simple page compare application. It helps web developers and designers to see HTML-code(text) differences between web pages.

It doesn’t take original page source. It takes browser generated DOM compliant view source. It omits Doctype declaration and HTML tags.

After installation, to use this, one has to
1. Right click on a page & select ‘Start DIFF’ (this action saves the current page to memory),
2. Go to the page which one wants to compare (with the saved one) and
3. Right click on the page & select ‘Show DIFF’.

Extension Tracker 2.1.0

Tracks your extensions on addons.mozilla.org. It sits in the status bar. You enter the id number of a extension developer. Click to refresh it. See Version notes for current capabilities

View formatted source (format source extension)

Displays formatted and color-coded source and optional CSS information for each element.

You can see exactly which CSS rules match for an element. The rules are displayed including file name and line number. The topmost element is that with the highest priority.

You can fold/unfold/hilite block elements (table, tr, td, div, span,…). Really cool feature: select a block level element of interest directly in the page and view it’s source! To help you to quickly analyze the source code you can view images directly from the source and add comments to folded block elements. The code view is based on the rendered document, so you will also see dynamically (by Javascript) created and modified html elements! Works also with frames and selected text.

Available in English, German, Danish, Dutch, French, Spanish, Italian and Portuguese.

Palette Grabber 0.3.6

Creates a color palette for Photoshop, Paint Shop Pro, GIMP, or Flash based on the current page.

Total Validator 4.0

Perform multiple validations and take screen shots in one go. This 5-in-1 validator works with external, internal, or local web pages using the Total Validator service or local copy of the Pro desktop tool…

Provides true HTML validation (HTML 2.0 to XHTML 1.1) using the official DTDs, plus added attribute checking. So you no longer have to put up with the limitations of the W3C validator (no type checking) and tools like HTML Tidy which interpret the standards incorrectly (they don’t use the official DTDs).

Also performs accessibility validation (WCAG, US-508), broken link checking, spell checking (5 languages), and takes screenshots using 24 browsers on Windows, Linux, and OS/X.

Save Complete 0.9b7

Saves a webpage completely, providing a better alternative to the flawed built-in save functionality of Firefox.

As more and more sites use CSS, Firefox’s built-in complete save becomes increasingly less effective, as it doesn’t support stylesheets. This extension fixes this, and saves the complete page, including all images and all stylesheets associated with the document, even imported stylesheets and images referenced in the stylesheet files.

Validaty 1.4.1
One Click Validator. Provides you a button to validate a page using a validator like validator.w3.org
IE Tab 1.3.3

IE Tab – an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox…

This is a great tool for web developers, since you can easily see how your web page displayed in IE with just one click and then switch back to Firefox.

If you need some instructions.
Please visit our official website on http://ietab.mozdev.org

Update Notifier

Notifies you when updates are available for your extensions and themes. Allows quick access to your extensions and themes and the ability to check both types for any updates. Easily configurable for automatically installing updates when available and checking for updates when Firefox starts.

It’s All Text! 0.7.2

Edit textareas using an external editor, because it’s all text!

Right click on a textarea, select “It’s All Text!” and edit the text in the editor of your choice.

Alternatively, click on the edit buttons added for your convenience. Right click on the edit buttons for even more options, including preferences.

Ever started type into an edit box on some web page (such as to post a comment or describe why your scooter was defective and they should send you new one)?

If so, then you need “It’s All Text!”

This miracle extension provides an edit button for any edit box[1] on any page or your money back[2]!

At the bottom left corner of any edit box, a little edit button will appear. Click it. If this is the first time you’ve used “It’s All Text!” then you will be asked to set your preferences, most importantly the editor.

The web page will popup in your selected editor. When you save it, it’ll refresh in the web page. Wait for the magic yellow glow that means that the radiation has taken effect!

Remember, with great power outages come great responsibility outages.


PS: Mac OS X users. I’m sorry, but due to the way applications are, especially editors, using It’s All Text! is a little harder than everyone else… see http://docwhat.gerf.org/2007/03/its_all_text_v06/ for some tricks. I am going to fix it but I don’t own a MacBook so it’s slow going. BTW: If you want to send me a MacBook…

[1] Also known as a TEXTAREA to web nerds.
[2] I can give you nothing in abundance.

Regular Expressions Tester

Regular Expressions Tester Homepage

by Sebo

Testing Tool for regular expressions with color

Regular Expressions Tester offers developers functions
for testing their regular expressions.
The Tool includes options like case sensitivity, color
highlighting for found expressions, a replacement function,
auto-closing of brackets, testing while writing and
predefined expressions.

Works with:

  • Firefox Firefox: 1.5 – 2.0.0.*


Weird. Unknown. Check the homepage. something about check boxes. hmm…
FireColour is a very handy Colour Picker and Converter. Its
already a part of FireCal. Its gives the colour values in 20
colour models. The conversions are now only for HEX, RGB and
XYZ to 20 models. More conversions will be added soon. The
colour picker component is a modified version of the
RainbowPicker extension. All suggestions are welcome.
Link Evaluator

Link Evaluator is a Firefox extension designed to help users evaluate the availability of online resources linked to from a given Web page. When started, it automatically follows all links on the current page, and assesses the responses of each URL (link). Link Evaluator examines both the HTTP status code and the page contents returned by each URL, and attempts to distinguish between various results, such as: broken links network time-outs authentication failure, and ‘incorrect/correct’ content for the given URL. This extension is similar to the Kevin Freitas’ Link Checker. Main differences:

  1. It has multi-threaded link testing (4 threads)
  2. It evaluates the whole page (not only the http response code)
  3. Uses the concept of red/green-flag phrases
  4. Allows storing customized sets of red/green-flag phrases
  5. Has a real-time control/monitor panel where the result of each link-test might be seen
  6. Can test inside framesets
  7. Has enhanced algorithm for link-coloration
  8. Adds "flag-phrases" info in the link tooltips
  9. Stores the original tooltips and may reverse to them..
  10. Link Evaluator is capable of detecting red- and green-flag phrases that have been embedded in special Web content for testing purposes. This "Link Evaluator-aware" content can contain flag phrases that are to be applied only to specific links or ranges of links.
Smart Link
Adds open in new tab / window options to right click menu for plain url texts (also handles white spaced and multi lined url texts)
Table Inspector

Reveals accessibility features added to tables.

this one will take some investigating

View Source Chart

* Draws A Color-Coded Chart of a Web Page’s Source Code

Source Charting…

* Graphically Displays HTML Tag Boundaries
* Graphically Defines Tag Nesting Order, Structure and Hierarchy
* Adds A Simple but Powerful User Interface *TO* Source Code


Source Charting Allows the User To…

* quickly scan and recognize a document’s tags without reading a single tag
* see how deeply nested an element is just by looking to its left (no scrolling/finding/reading tags)
* identify an element’s containing tags without having to scroll, find and read each tag


Converts selected ASCII to Unicode with right-click – Actually, converts to HTML character codes.

Developer Comments

0.3.5 – Compatible with Firefox 2.0

0.3.4 – Fixed the spelling issues. Altered description on page.

My goal is to eventually expand this into a larger extension with the
option to convert to Hex, Dec, Unicode (HTML), and maybe some other

MetaTags (aka. Meta Tags)

This sidebar displays page meta-information (metatags, links, etc.) Has
automated search engine submission menu.

Features include:

  • Watches currently loaded Web page and automatically updates the sidebar.
  • Displays metatags, links, language, base and base folder of the
    document, MIME type and charset, DTD, root tag, and XML namespace, last
    modification time, referrer, etc.
  • Keywords are numbered.
  • Warns about duplicate keyword phrases (emphasizes them with red color).
  • Extensible menu for automatic submission to search engines and SEO services.

    (Forms are filled automatically, based on document metadata.)
  • Related links (by Alexa and Amazon) and other Web services.
  • Tabbed browsing is supported.
  • Menu in the sidebar and in browser’s Tools menu.
  • Preferences dialog box.
  • Integrated with Live HTTP Headers Firefox extension.
Domain Finder

domainFinder firefox extension

Quickly carry out whois lookups on any url on a webpage or carry out a keyword domain search on any highlighted phrase or text.

Selenium IDE

Selenium IDE is an integrated development environment for Selenium
tests. It is implemented as a Firefox extension, and allows you to
record, edit, and debug tests. Selenium IDE includes the entire
Selenium Core, allowing you to easily and quickly record and play back
tests in the actual environment that they will run.

Preferences in Tools Menu

Adds the Preferences item back to the Tools Menu.

I don’t use the Edit menu often, apart from the Preferences item, so I
removed it (in userChrome.css). With this extension you can save space
for bookmarks and what not and still have access to the Preferences.
This does not apply to the Windows versions of Firefox.

Full Cal

See a larger calendar view on Google Calendar. Use a customizable
shortcut key (default is ALT-SHIFT-C) or the toolbar button to go to
Google Calendar, and then to toggle view modes.

It will also work on any Google Apps for your domain branded calendar:
Just enter the address as the calendar site under options

This extension is based heavily on Full Map.

Document Map

Displays the current page’s heading structure in the sidebar, allowing rapid navigation between sections

CSE (X)HTML Validator

Validates HTML documents using the CSE HTML Validator engine for
Windows. Requires CSE HTML Validator for Windows. The lite edition is
available for free at

Opera View (incompatible with Netscape 9)

Open pages in Opera from Firefox and Mozilla context menus. Very usefull for web developers but not only!


Opens selected text in a new tab.

Developer Comments

Right-Click-Link allows you to select text on a web page, right-click
and hit ‘Open "selected text"’. The extension then
opens a new tab and navigates to the address you selected. The
extension is only useful on pages where there are URLs in the text that
aren’t linked.

ImgLikeOpera allows load only the images that you want in Firefox browser. This extension is very useful for non broadband users.


– placeholders for blocked images (hi, LJ treads!);

– (re)load image from context menu or Ctrl+rightMouseClick;

– forced expiration time (5 minutes – 3 months);

– policies for tabs;

– filters.

You can set one of policies for each tab:

– don’t load images;

– load cached images only;

– load images for the originating Web site only;

– load all images.

Also you can block/allow images with filters. ImgLikeOpera supports two types of filters: simple, and Regular Expression (thanks AdBlock).

Free E-Book Search

Search with the highlighted text/right click for your favorite Free
ebooks in www.freebookzone.com. You may search using the Book Title,
ISBN (10 Digit), Description, Book Author and even the ebook backward
link. Just have a try and find how useful it is.

Offline Page Validator

Submits the current open page to the W3C validation tool, even if the page is on a non-public server, a local file, requires login, etc.

Don’t validate your confidential information.

fixed (w3c had changed their form). thanks to Petr Andrs.

you can also use web developer toolbar Ctrl-Shift-A

I got my shirt today. sweet ;D

Inspect Context

Open Dom Inspector at this node from Inspect on context menu. Dom
Inspector must already be installed. Handy for checking both page for
web developers and chrome for extension developers.


This tool will let you find HTML/XHTML blocks visually just by moving
around the mouse pointer over the page, and modify them "on
the fly" from your browser quick and easily.

To use it, just click on the "Lola" icon (find it at
the lower tool bar of your browser) to enter the
"select" mode. Move the mouse pointer over the page
you want to inspect or modify, and every HTML/xHTML block will be
highlighted to you. Click over the block to modify their content, very

Enjoy and send me your comments, please!


Powerful and user-friendly "selector" utility for
selecting elements and doing various actions on them. It can be used
for cleaning up a page prior to printing it (by removing and isolating
elements), for making the page more readable, and (most appreciated by
web developers), for analyzing the structure of a page.

To use Aardvark, just right-click on the page and select
"Start Aardvark" from the popup menu. As you move the
mouse over the page, you will see a red rectangle around the current
block element, along with a label showing its type, and if they exist,
its id, class, and style. You can then press various keys on the
keyboard to do things, for instance W to navigate wider (as shown in
the image), R to remove the element, I to isolate the element (that is,
remove everything else on the page), V to view formatted source of that
element, U to undo, Q to quit aardvark, and H for help, that is, a list
of the 12 available keystrokes.

Yes Popups

Temporarily disable popup blocking. Inspired by the Popups Must Die!
extension. To toggle popups on/off, either click on the icon or press

Open Link Host
  • Open the link’s host in Current Window/New Window/New Tab
  • Example: Open Link Host on http://www.captaincaveman.nl/extensions/openhost.xpi will open http://www.captaincaveman.nl
  • Available in: en-US, nl-NL, fr-FR, it-IT, ja-JP, ca-AD, de-DE, es-ES, nb-NO, ko-KR, bg-BG, pt-PT, tr-TR, pt-BR, be-BY, ru-RU, zh-TW

Developer Comments
For detailed help and information, visit the forum: http://forum.captaincaveman.nl

Quick info:
Just a small one from me again. It saves you the trouble of opening a link (like from google), then seeing that only a subpage has opened, and removing half of the address in the address bar.
Most people wont see the use of it, but if there are just a couple of you that do. I’m happy.

After mailing with Clav, we have decided to keep this extension and his GoTo extension separate.


Feature rich XPath generator, editor, inspector and simple extraction tool.

Developer Comments
Get the latest version and documentation at http://xpath.alephzarro.com

There is a new version 1.3 available since Oct 27,2006. It is FF 2.0 compatible. Besides, it brings few severe bugfixes, improvements, new handling of default namespaces, and new cross-frame XPath evaluation.


Checks the IP Address of the current site and displays an alert if it matches one of the specified IP Addresses.

Use it to alert you when you browse to a production website instead of one of the development sites.


See more search results etc. on one page, concatenating several pages together.

To use, right-click on a & "Next" link (it works with
other languages, too) or a "2" link, select
Re-Pagination, All. Or select Re-pagination, Limited and the number of
pages to append. For an example, see the previews of this extension.

For photos, right-click on the "Next" link, select
Re-pagination, Slideshow and the duration in seconds of each page
display. The pages will replace each other instead of appending.

GCalQuickTab 0.3.3

If you have both Gmail and Google Calendar, GCalQuickTab makes it easy
to switch between the two webapps in your browser by overriding the
default behavior of the new Gmail/Google Calendar links that appear in
the upper-left-hand corner of those sites. If the linked webapp is
already open, then it brings that tab into focus instead of opening the
webapp in a new window. You can also switch apps by using keyboard
shortcuts: ‘g’ for Gmail and ‘l’ for Calendar.


GUI for translation of language files of your PHP scripts. By language file I mean files containing all translated strings of your script.

See example on official site.

Developer Comments

Next version should handle define() and more array types. A search method should also be added. I also hope the parsing to be faster.

See official homepage for 2.0 compatible version : phpLangEditor 2.1.1.

Quick Preference Button

Access common preferences from a menu button. It includes settings for
page download and display, tabs, proxy, spoofing user agent (user agent
switching), enable or disable the Adblock extension and more. Click on
More Preview, under the image for the full preview with more detail.

AVZ Calculator

simple calculator extension for Firefox.
The extension can be launched by clicking the dark gray calculator icon in the Firefox status bar.

Quick Restart

Ever needed to
restart Firefox after enabling or disabling an extension, switching to
a new theme, or modifying configuration files (such as userChrome.css
or user.js)?

simple extension adds a “Restart Firefox” item to the Tools menu. You
can also use the Ctrl+Alt+R (1.0.1) keyboard shortcut, or the new
toolbar button (1.1.0).

Character Identifier

This extension adds a context menu item for selected text that provides
more information (from the Unicode database) about the characters

CSS Viewer

A simple CSS property viewer


A myriad of tools to assist with schoolwork

Unhide Fields

this extension allow you to view and edit hidden fields content.


Notify can:

  • – notify you when selected pages change
  • – open pages at a chosen time
  • – display page’s last modified date in the status bar.

Homepage: http://notify.torino.pl/

Be notified when your favourite sites change! Webpage monitoring with Notify it’s easy.

Execute JS

Execute JS is a enhanced JavaScript-Console, where you can comfortably enter and execute arbitrary JavaScript-Code and modify functions.

What can you do with Execute JS?

  • Execute arbitrary (multiline) JavaScript Code in every window you like.
  • Evaluting the properties of an object.
  • Modifying functions on the fly i.e. you can search for functions, load and edit them and eventually save the modified function.

In addition Execute JS provides a history of the executed code snipets. By pressing Ctrl+Up/Down you can navigate in this history. Also some shortcut notations for frequent used expressions (e.g. getbyid for document.getElementById) were provided.

You can open the console window via the menu or via an configurable shortcut (default: Ctrl+Alt+Shift+C)


A developer tool for interacting with web services and other web resources that lets you make HTTP requests, set the entity body, and content type. This allows you to interact with web services and inspect the results.

After you install it, just go to View->Sidebar->Poster to open the tool as a sidebar. After that, try a GET or POST on your favorite web service or site.

The code is available from http://code.google.com/p/poster-extension/

ErrorZilla Mod
Implements a useful error page when a website cannot be reached. Will add "Try Again," "Google Cache," "Coralize," "Wayback," "Ping," "Trace," and "Whois" buttons, along with the Firefox logo to the error page when a website isn’t found or a web server is down.
Extended Copy Menu

Provides the option to copy selection as plain text or html.

It adds a “Copy As Html” and “Copy As Plain Text” to the context
(right-click) menu. It is useful if you want to copy the text or
underlying html from a web page into documents, posts or other

Web Color Names Selector

Web Color Names Browser Selector

Page Update Checker

Tired of clicking the reload button?
Page Update Checker (aka PUC — pronounced "Puke") is a FireFox extension that automatically checks to see if web pages have changed.

How to Use:

Once installed, you will be able to right-click on any page in Firefox and select "Monitor for Updates." The PUC options will open up and you can select how often you would like PUC to download the webpage and see if it has changed. To return to the options menu later, select "Tools" -> "Page Update Checker Options…"

Click the homepage link to find the PUC Wiki and share your Update Checkers!

Event Spy

Lets you watch JavaScript events as they occur

DOM Event Spy adds a context menu item to nodes in DOM Inspector’s tree
view that allows you to watch events that pass by the selected node.
Note: You must have DOM Inspector installed to use Event Spy.

Split Link

Split Link will allow you to view the true url that you are being redirected to. Sometimes links may contain hexadecimal characters or numerous parameters that make them more difficult to read. By using Split Link you can remove the parameters, remove javascript code from links, and convert all of the hexadecimal characters back to ascii.

After Split Link is installed it will appear on the right click menu. Just right click on a link and then click "Split Link". A new window will pop up containing the reformatted url’s. If you click on one of the url’s in the new window, it will automatically redirect the parent window to that ur

Add-ons Sidebar

Lets you view your Add-ons in the sidebar by pressing Ctrl+Shift+E.

Small and simple extension: only 2 KB!
Only works in development builds with the new Add-ons Manager!
Don’t install this if you have Firefox 1.5.0.x or lower.


NOTE: I did not install this extension as it would probably do little for my benefit


  • MozRepl, to telnet into a running Firefox and program it from the inside
  • MozUnit, a framework for test-driven development, with a graphical runner and source browser
  • ModuleManager, a lightweight module/namespace system built around the jssubscript loader
  • Various libraries: an RDF-to-object mapper, an in-memory object DB, and an asynchronous state machine driver.

Audit accessibility of your web site. Use the validator of www.ocawa.com.

About Menus

Easily access the various About menus in Firefox.

JavaScript Debugger (Venkman)

Developer Comments


1. You cannot open the JavaScript Debugger a second time after closing it – this is not our bug! It is a bug with Firefox 1.5 and 2.0. If we find a way around it, we will of course include it, but until then you must restart Firefox to reopen the debugger.

The problem is that Firefox 1.5 and 2.0 objects to the missing files worse the second time you try to open the window. The unofficial version changed more than just the version, it also removed references to these files. That will stop some features working on Mozilla Suite/SeaMonkey.

If you want to, try using this official version on a nightly build of Firefox from trunk (codenamed Minefield) – it happily opens many times, because they’ve fixed the bug since Firefox 2.0.

Open Image in new Tab

As several people have said in comments, it is possible to open images in new tabs or windows by pretending the menu item for "View Image" is a link in a page – middle-click or ctrl-click for a new tab, shift-click for a new window.

While for some people this may be ok, for others it is unintuitive – I, for one, did not know until the comments started coming in that the menu item could be treated like a link. That is why this extension exists – for those who find this behaviour unintuitive and prefer a separate menu item. Even though I now know of the behaviour, I still don’t find it "normal" to middle-click a menu item; I’m sure there are other people in the same position.

Firefox Google Bookmarks

Creates a menu to access google bookmarks from any computer. Needs Google Account to use this extension.

– Version 0.2.1 which works with Firefox 2.0 is released on the website

  • Added the ability to import or add Firefox Bookmarks to Google Bookmarks
  • Added the ability to Sort by Date and title
  • Added Context Menu buttons

Developer Comments

Before Installation:


* You should have Google Account to access Google Bookmarks and use this extension. You can create a new google account at https://www.google.com/accounts/.
* You need internet connection and a computer :):):)


* You can save your bookmarks to ONLY ONE account in this version. Accessing multiple accounts may not be feasible in Firefox.
* It ALWAYS picks the account you are logged into (no matter what account you gave in extension’s preferences or options) for the same reason said above. So, be careful if you use 2 accounts as the bookmarks may go to either of your accounts based on the login.
* This is the first version and may need lot of improvement. So, let me know if you encounter any bugs.


* In the next version, interface for importing your existing firefox bookmarks to google bookmarks will be provided. So, please wait until then.
* Keyboard and context menu shortcuts
* Please mail me if you have ANY OTHER feature requests.

Link Alert

Changes the cursor to indicate the target of a link.

Indicates links to the following:

  • -New Windows
  • -Secure Sites
  • -Email Links
  • -JavaScript
  • -Word Documents
  • -Excel Spreadsheets
  • -PDF Files
  • -Zip Files
  • -Applications
  • -Text Files
  • -Images
  • -RSS Feeds
  • -AIM Links
  • -and more…
Nuke Anything (Enhanced)

Allow hiding of almost anything -for example before printing – via context menu "Remove Object".

This version fixes the "remove selection" functionality and allows for multiple "Undo Last Remove".

If you have the older extension "Nuke Anything" please make sure you uninstall it and restart Firefox before installing "Nuke Anything Enhanced".

The effect of this extension are temporary, you can use another extension, "Remove It Permanently" if you want your removed objects to be remembered.

Viamatic WebMail++

Preview your messages with a single click. Adds AJAX support to the Yahoo! mail. If you use Yahoo! mail just try it out.

  • Preview your messages without leaving your inbox. Adds a small “plus sign” next to your email list. Click on the “plus sign” to preview the message.
  • Send back messages with a single click using Instant Reply
  • Download any attachment with a single click
Source Editor

View and Edit source of HTML element.

Use the button on status bar to activate/desactivate and the double click or the context menu to edit source of the selected element

Stylesheet Chooser Plus

StyleSheet Chooser Plus (aka SSCP) persists choice of document stylesheets, selected by a statusbar icon, if page’s author provides alternatives styles. The choice is kept during navigation and between sessions. User has ability to delete a saved choice.

Server Replace

Need to open the same page on different servers (e.g. your development server, QA, Production)? This plugin replaces the server in the current URL with the server from a bookmark on the bookmark toolbar if you hold ALT+CTRL while opening it.


See the tags on a page without viewing the sourcecode.

One installed the X-Ray command is available by right-clicking as well as in the Tools menu. When applied to a page it can help you see how the document was constructed without having to go back and forth between the sourcecode and the page in your browser. Is that list made of li, dd or p elements? Is that an h3 tag or just some bolded text? X-Ray shows you what’s beneath the surface of the page.