Hide Unified Extensions Button Firefox 111

Figure 1

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.

Figure 2

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.

  1. You need to set toolkit.legacyUserProfileCustomizations.stylesheets to true from about:config so userChrome.css will work.

Figure 3

  1. Open about:support find Profile Directory and click the Open Directory button.

Figure 4

  1. After File Explorer opens, create a folder named chrome under your Firefox profile directory.

Figure 5

  1. Open the chrome folder and create a file with the name userChrome.css (for Linux, this is case-sensitive).

Figure 6

  1. Open userChrome.css with a text editor and paste this CSS code & Save.
#unified-extensions-button {
  opacity: 0 !important;

Figure 7

  1. Open about:restartrequired and Restart Firefox, so your tab will not be gone.

Figure 8

Hide Unified Extensions Button (Firefox <110)

  1. Open about:config & Accept the Risk and Continue

Figure 9

  1. Search extensions.unifiedExtensions.enabled set to false

Figure 10 Figure 11

  1. Open about:restartrequired and Restart Firefox

Figure 12

  1. After restart extension button will be reverted to overflow menu like Firefox version 108 and older

Figure 13

Disable Firefox View & Tab Manager

You can read article here Remove Firefox View & Tab Manager Firefox 106

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