Firefox 109.0 releases on January 17, 2023, the biggest change in this version is Manifest Version 3 (MV3) extension support is now enabled by default (MV2 remains enabled/supported). This major update also ushers an exciting user interface change in the form of the new extensions button.
Hide Unified Extensions Button (Firefox >111)
The about:config
flag was removed in Firefox version 111, so extensions.unifiedExtensions.enabled flags will not work. However, you can still hide it with userChrome.css
. We can change the unified extension button to opacity: 0
with userChrome.css
, so the button is invisible but still works.
- You need to set
toolkit.legacyUserProfileCustomizations.stylesheets
totrue
fromabout:config
souserChrome.css
will work.
- Open
about:support
find Profile Directory and click the Open Directory button.
- After File Explorer opens, create a folder named
chrome
under your Firefox profile directory.
- Open the
chrome
folder and create a file with the nameuserChrome.css
(for Linux, this is case-sensitive).
- Open
userChrome.css
with a text editor and paste this CSS code & Save.
#unified-extensions-button {
opacity: 0 !important;
}
- Open
about:restartrequired
and Restart Firefox, so your tab will not be gone.
Hide Unified Extensions Button (Firefox <110)
- Open
about:config
& Accept the Risk and Continue
- Search
extensions.unifiedExtensions.enabled
set tofalse
- Open
about:restartrequired
and Restart Firefox
- After restart extension button will be reverted to overflow menu like Firefox version 108 and older
Disable Firefox View & Tab Manager
You can read article here Remove Firefox View & Tab Manager Firefox 106