checking

by FujiSenseiSan

221 Add-ons in this Collection

XSSed Search by snipe

Not yet rated

27 weekly downloads

Search the cross-site scripting database at XSSed.Com

Lock The Text by FairSimple

Rated 5 out of 5 stars 10 reviews

1 user

Encrypt your text data in browser before you submit it to a network

Open Long Url by Jeremy Gillick

Rated 5 out of 5 stars 7 reviews

0 users

Adds an option to your File menu to allow you to open long, multi-line...

DSN Settings by Trustedbird

Rated 5 out of 5 stars 2 reviews

1 user

Adds user interface settings for Delivery Status Notification (DSN) requests. This addon is usefull for settings for Delivery Notification request and better experience with Notification Viewer addon.

Fit Images by V@no

Rated 5 out of 5 stars 3 reviews

21 users

Fit large images to window when viewing a message.
Control how you want to fit images: by width, height or both.

Open As Webfolder by Julian Reschke

Rated 3 out of 5 stars 10 reviews

0 users

Open pages and links in Windows WebFolder WebDAV client (similar to "open in Webfolder" checkbox in IE's open...

TheRealURL by Nir Yariv

Rated 3 out of 5 stars 7 reviews

1 user

Get URL information: expand short URLs, get title and content type information without visiting the site.

UPDATE, AUG 2013: THIS EXTENSION IS NO LONGER SUPPORTED. The source is open - if you wish to take on the development, you're welcome.

Environment Proxy by Peter Leugner

Rated 4 out of 5 stars 8 reviews

0 users

Sets proxy settings from environment variables.

Alphanumerator by Dave Kahler

Rated 5 out of 5 stars 2 reviews

0 users

Convert alphanumeric phone numbers to just numbers. Simply highlight the text, right-click it, and click "Alphanumerate". For example, 1-800-PICK-UPS would be converted to...

CallingID Link Advisor by CallingID

Rated 2 out of 5 stars 10 reviews

0 users

CallingID Link Advisor verifies the links you see in Firefox and Thunderbird are safe before you follow them. When the mouse is placed over any link a risk assessment and the full details of the site owner are displayed, helping you evaluate the...

NestedQuote Remover by Achim Seufert

Rated 4 out of 5 stars 13 reviews

1,057 users

Remove nested quotes when replying to a mail.

Element Hiding Helper for Pan by cstkingkey

Download Now

Experimental

Rated 4 out of 5 stars 8 reviews

0 users

Help you create element hiding rules for Pan to fight the text ads.

Stop Tube HTML5 by Kashif Iqbal Khan

Download Now

Experimental

Rated 3 out of 5 stars 65 reviews

4 users

Stops autoplay of YouTube HTML5 videos (WebM). It is Flash-Block equivalent for HTML5 videos.

Whois & Flags Firefox & Websites Popularity Rating by myip.ms

Rated 4 out of 5 stars 24 reviews

5 users

Display Country Flag indicating Website Physical Location (Country, State, City). Website Popularity (Live Visitor Statistics). Shows how many users are visiting any World Website per day. Website IP IPv6 Addresses, DNS, Hosting. IP Whois Lookup

Channel Guard by Garisson Kingstorm

Download Now

Experimental

Rated 4 out of 5 stars 2 reviews

0 users

Channelguard disables plugins and protocol handlers to ensure maximum security against side-channel attack.
  1. 1
  2. 5
  3. 6
  4. 7
  5. 8
  6. 9
  7. 10
  8. 11
  9. 15
Results 106120 of 221

What are Collections?

Collections are groups of related add-ons that anyone can create and share.

Explore Collections