Select some text, right-click and choose"Search image" in the menu, a Google Image tab will open with your results.
Add a link near password fields to hide or show passwords.
A context menu to open images in a new tab
Select some text, right-click and choose"Search in YouTube" in the menu, a new tab will open with the searched text.
Save current page as PDF. Very simple. No permissions, no third-party server. Uses only built-in Firefox converter. Works on Windows and Linux, not on Mac.
Open bookmarks in a new tab
Currency exchange rates in the status bar (data from Yahoo!Finance or Google on option). Display currency graphs.
Checks every 404 pages. If an archive exists in archive.org, a banner is displayed to open this archive.
Add a link in Wikipedia pages that opens new tab with related images. Results by Google images.
Easy access to French radio channels. Accès rapide et facile aux principales stations de radio françaises