Web and Developer Tools
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.
BrightSide XUL Installer No Restart
Automatically installs a set of domains to the Remote XUL whitelist.
Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Tumblr, and many, many other sites. You can even customize Firefox and other programs themselves.
custom additions to Stylish extension
Provides extended link properties: size of linked file, last modified time, etc.
Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.
GitHub Extension Installer No Restart
Install Browser Extensions straight from GitHub Repositories
Click-to-Play Manager No Restart
Manages the Click-to-Play domain whitelist.
Fixes up numerous SeaMonkey browser interface issues (eg. adding support for popup ALT attributes), as well as adding some handy features for developers and power users (eg. configure source viewer, work online/offline).
Re-Pagination No Restart
See more search results etc. on one page, concatenating several pages together...
Remote XUL Manager No Restart
Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.
View HTTP headers of a page and while browsing.
Live HTTP Header Fix By Danyial ITs Working On Firefox Again Fixed Reply Problem
Clear Cache and Data No Restart
Clears the browser cache and other selected storage.
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Zing! Locale Switcher No Restart
Want to change from one language to another? Zing! and the locale is switched.
Reload Skip Cache Button No Restart
Reload page without using content stored in the browser cache to make sure you get any updates.
IP Flager No Restart
Shows country flag for the website in the location bar.
InlineDisposition Reloaded No Restart
InlineDisposition Reloaded changes the disposition type of "Content-Disposition" response headers from "attachment" and "file" to "inline"
Professional Geo Add-on with security features and advanced network tools. Anti-phishing. Protection against DNS spoofing and fake sites. All DNS records for domain. The real location of web server, country flag, extended information about datacenter