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Can I make it so that menu items do not slide in Firefox, just activate instantly when I click them? (such as the settings menu)

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I would like to tweak something regarding the appearance/performance of the Firefox menu. I don't like the animated menus, such as the slow opening of setting when you click the settings button, or the slow way the tab list rearranges when a tab is closed. I'd much rather have these happen instantaneously. If you have ever disabled visual bells and whistles on Windows to improve performance, you know what I mean. It's quite annoying to wait half a second for something that I know the computer can do instantly :) Damn modern design.

By the way, I use the standard theme. Thank you for reading.

I would like to tweak something regarding the appearance/performance of the Firefox menu. I don't like the animated menus, such as the slow opening of setting when you click the settings button, or the slow way the tab list rearranges when a tab is closed. I'd much rather have these happen instantaneously. If you have ever disabled visual bells and whistles on Windows to improve performance, you know what I mean. It's quite annoying to wait half a second for something that I know the computer can do instantly :) Damn modern design. By the way, I use the standard theme. Thank you for reading.

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HI wanderer42, I understand that you would like to change how the menus appear in Firefox.

Specifically for the animation of the preference/options menu: In order to change your Firefox Configuration please do the following steps :

  1. In the Location bar, type about:config and press Enter. The about:config "This might void your warranty!" warning page may appear.
  2. Click I'll be careful, I promise! to continue to the about:config page.
  3. search for animate, and change browser.preference... to false

(in version 30 or older is used to be

browser.uiCustomization.disableAnimate)

If this does not help the menus as well I found a work around created in the Mozillazine forums, a userstyle: https://userstyles.org/styles/99666/disable-arrow-panel-animations-v3