Stacked Inspector Requires Restart
Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.
View Page Source in New Tab, Current Tab or New Window
Lets you add userstyles ( website and browser themes) with a mini addon.
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.
Open your OmniGraffle files for free
Nuke Anything Enhanced Requires Restart
Allows you to hide almost anything via context menu 'Remove Object'.
Blocking all Meta Auto-Refresh reloading according to user-preference
Who is Hosting This Website is a free Add-on service for telling you- where websites are being hosted. "Who is Hosting this Website?" will also determine and display the IP address, DNS records and domain name ownership information (Whois Records).
Shows detailed information about your IP and location.
LinkSidebar Requires Restart
View, search and test hyperlinks in a web page.
Perform group actions on multiple links like opening in tabs, copying link locations or testing to determine response times. Allows you to search/sort links and highlight their position on the webpage.
StyleSheet Chooser Plus Requires Restart
StyleSheet Chooser Plus (aka SSCP) persists choice of website stylesheets.
Fusebox 5 Reload Requires Restart
This extension (for Firefox 1.5 - 3.0) adds a menu item to the context menu (right-click) and the Tools menu to rebuild the Fusebox 5 memory structure and reparse the XML files. It includes the new (in Fusebox 5) options to loadclean and parseall. Yo...
This add-on renders standalone images on a transparent background, so you can see the image in all its glory!
CoLT Requires Restart
CoLT (short for "Copy Link Text") makes it easy to copy either a link's text, or both the link text and its URL in a format you specify. This non-invasive extension simply appears as context menu items when you right-click a link. Fully customizable!
Go full screen with one click on the button.
Element Properties Requires Restart
Returns the 'Properties' menu item that was removed in Firefox 3.6 to the context menu.
This add-on is not compatible with your version of Firefox because of the following:
- Add-on has opted into strict compatibility checking.
WebSocket monitor is an extension for Firefox developer tools that can be used to monitor WebSocket connections in Firefox. It allows to inspect all data sent and received.
JS Print Setup Requires Restart
View formatted source (format source extension) Requires Restart
Displays formatted and color-coded source and optional CSS information for each element. ...