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Element Inspector

In the DOM Inspector,quickly navigate to the any elements

Rated 5 out of 5 stars (32)
3,980 users
Updated March 25, 2017

Classic Toolbar Buttons

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions.

Beta builds on versions page!

Rated 5 out of 5 stars (163)
37,780 users
Updated March 24, 2017

Flagfox

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Rated 5 out of 5 stars (687)
445,368 users
Updated March 21, 2017

Open With Requires Restart

Quickly test out your web pages in Internet Explorer, Chrome, Safari, or Opera. Open With opens the current page in your other browsers with just one click. Add Open With to your menus, toolbars and developer toolbox today!

Rated 4 out of 5 stars (189)
22,318 users
Updated March 21, 2017

Open With Photoshop

Open With Photoshop is a new companion for web and graphic designers to open up any web image with Adobe Photoshop via a single and quick mouse click.

Rated 5 out of 5 stars (72)
15,639 users
Updated March 19, 2017

NoScript Security Suite Requires Restart Featured

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

Rated 5 out of 5 stars (1,650)
2,134,649 users
Updated March 17, 2017

Addons Memory Usage - Button Requires Restart

Add toolbar button for about-addons-memory-pm

But not only, also provide shortcuts for :

- Free Memory (needs free memory button)
- Abouts list page (about:about)
- Plugins page (about:plugins)

github.com/intika/about-addons-memory-pm

Not yet rated
88 users
Updated March 17, 2017

CloudBleed

CloudBleed, search have you visited affected websites recently by browser history.

Rated 5 out of 5 stars (3)
2,547 users
Updated February 27, 2017

Web Developer Requires Restart

The Web Developer extension adds various web developer tools to the browser.

Rated 5 out of 5 stars (263)
412,332 users
Updated February 18, 2017

Modify HTTP Response

Rewrite http response body using search & replace patterns

Rated 5 out of 5 stars (2)
906 users
Updated February 13, 2017

FoxyProxy Basic Requires Restart

FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.

Rated 4 out of 5 stars (32)
21,376 users
Updated January 28, 2017

FoxyProxy Standard Requires Restart

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

Rated 4 out of 5 stars (374)
252,239 users
Updated January 28, 2017

Sidebar Add Custom Tab Requires Restart

Adds an 'add custom tab' option to the Tabs drop-down menu of SeaMonkey's sidebar.

Rated 5 out of 5 stars (1)
12 users
Updated January 26, 2017

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (6)
932 users
Updated January 20, 2017

Image Zoom (ugly fixes) Requires Restart

An ugly attempt at fixing Image Zoom

Rated 4 out of 5 stars (10)
2,443 users
Updated December 12, 2016

Screengrab (fix version) Requires Restart

Screengrab! saves webpages as images.
0.99 released!
New features: upload to internet

Rated 5 out of 5 stars (322)
121,368 users
Updated December 8, 2016

Font Finder Requires Restart

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Rated 4 out of 5 stars (78)
33,629 users
Updated December 1, 2016

Element Hiding Helper for Adblock Plus

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

Rated 5 out of 5 stars (459)
510,649 users
Updated October 26, 2016

Nightly Tester Tools Requires Restart

Useful tools for the nightly tester.

Rated 4 out of 5 stars (195)
23,509 users
Updated October 21, 2016

DOM Inspector Plus! [dm] Requires Restart

Improved DOM Inspector! [dm version]. Box Model new layout & more data, see screenshot!. Horizontal scroll for Dom-Tree, and some more.
Inspects the structure and properties of a window and its contents.

Rated 5 out of 5 stars (5)
509 users
Updated October 21, 2016