Miscellaneous

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JavaScript Debugger Requires Restart

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

Rated 4 out of 5 stars (49)
15,222 weekly downloads

ImportExportTools Requires Restart

Adds some tools to import and export folders and messages

Rated 4 out of 5 stars (160)
13,464 weekly downloads

SQLite Manager Requires Restart

Manage any SQLite database on your computer.

Rated 4 out of 5 stars (69)
12,363 weekly downloads

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)
10,087 weekly downloads

Download Status Bar

If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.

Rated 5 out of 5 stars (343)
9,711 weekly downloads

Ad-Blocker

Ad Blocker lets you block all ads, tracking & malware from the web world. It is an effective solution to browse the web without offensive and annoying ads you hate to see.

Rated 4 out of 5 stars (21)
9,674 weekly downloads

Provider for Google Calendar Requires Restart

Allows bidirectional access to Google Calendar

Rated 4 out of 5 stars (1,020)
9,393 weekly downloads

Auto Resize Image Requires Restart

Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).

Rated 4 out of 5 stars (26)
8,406 weekly downloads

adaware ad block

By blocking annoying ads and nosy trackers, adaware ad block nearly doubles your browsing speed! And with the most robust antivirus-level cloud-scanning technology of any ad blocker on the market, you’ll be safe from the latest cyber-threats.

Rated 4 out of 5 stars (33)
8,247 weekly downloads

Tiny JavaScript Debugger Requires Restart

TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.

Rated 4 out of 5 stars (7)
5,779 weekly downloads

QuickNote Requires Restart

A simple note-taking extension.

Rated 5 out of 5 stars (179)
4,746 weekly downloads

MinimizeToTray revived Requires Restart

Minimizes windows into the system tray.

Rated 4 out of 5 stars (337)
4,005 weekly downloads

UnMHT

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 4 out of 5 stars (239)
2,915 weekly downloads

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)
2,594 weekly downloads

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)
2,317 weekly downloads

Copy Plain Text 2 Requires Restart

Copies text without formatting

Rated 5 out of 5 stars (82)
2,082 weekly downloads

ProfileSwitcher Requires Restart

It adds some options to launch easily other profiles and the Profile Manager.

Rated 4 out of 5 stars (96)
1,683 weekly downloads

Restart

"Restart" menu and button, with configurable shortcut key.

Rated 5 out of 5 stars (65)
1,542 weekly downloads

FoxClocks

FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.

Rated 4 out of 5 stars (330)
1,494 weekly downloads

Exif Viewer Requires Restart

Displays the Exif and IPTC data in local and remote JPEG images.

Rated 4 out of 5 stars (87)
1,456 weekly downloads