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#1 2022-03-10 20:10:11

tylerdurden
Member
From: /home
Registered: 2018-07-16
Posts: 39  

HOWTO - Guide to restoring classic interface in Firefox 91 ESR

If you're unhappy with the changes to the Firefox interface in recent versions, don't worry. It's possible to change this and it's not overly complicated. I'm posting this quick guide to give you an idea of how it works.

Before:

Capture-du-2022-03-10-20-35-32.png
enlarge

After:

Capture-du-2022-03-10-20-38-54.png
enlarge

Here's how:
  • Navigate to about:config

  • Type toolkit.legacyUserProfileCustomizations.stylesheets

  • Set value to true

  • Create folder chrome in your Firefox profile folder, i.e.

    mkdir ~/.mozilla/firefox/<PROFILE>/chrome
  • Create file userChrome.css in this directore, i.e.

    touch ~/.mozilla/firefox/<PROFILE>/chrome/userChrome.css
  • In userChrome.css you can put the following CSS code to change the tabs:

    .tab-background{
    border-radius: 0px 0px !important;
    margin-bottom: 0px !important;
    }
    .tabbrowser-tab:not([selected=true]):not([multiselected=true]) .tab-background{
    background-color: color-mix(in srgb, currentColor 5%, transparent);
    }
    menupopup > menu, menupopup > menuitem{
    padding-block: 2px !important;
    min-height: 0px !important;
    }
    :root{
    --arrowpanel-menuitem-padding: 0px !important;
    }
    /* active tab accent color */
    .tabbrowser-tab[selected="true"] .tab-background {
      border-top: 2px solid #5294e2 !important;
      }

    In this example, I gave the active tab the accent color #5294e2 which I based on arc-theme but you can change that to whatever you want. Note that this code will also reduce padding on your Firefox menu so it looks more compact.

  • You can also add the following code to userChrome.css to keep the address bar from "popping out", though you may have to fiddle with the url-toolbar-height settings so it aligns properly. The following works for me:

    #urlbar[breakout],
    #urlbar[breakout][breakout-extend] {
      --urlbar-height: 28px !important;
      --urlbar-toolbar-height: 38px !important;
    
      width: 100% !important;
      top: 3px !important;
      left: 0 !important;
    }
    
    #urlbar[breakout][breakout-extend] > #urlbar-input-container,
    #urlbar-input-container {
      height: var(--urlbar-height) !important;
      width: 100% !important;
      padding-block: unset !important;
      padding-inline: unset !important;
      transition: none !important;
    }
    
    #urlbar[breakout][breakout-extend] > #urlbar-background {
      box-shadow: 0 1px 4px rgba(0,0,0,.05) !important;
      animation: none !important;
    }

That's it.

Note

You can revert to the default interface simply by setting toolkit.legacyUserProfileCustomizations.stylesheets to false in about:config without needing to delete the userChrome.css file or the chrome folder.

Reference material:

Last edited by tylerdurden (2022-03-10 20:12:18)

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#2 2023-04-12 04:09:25

GlennW
Member
From: Brisbane, Australia
Registered: 2019-07-18
Posts: 612  

Re: HOWTO - Guide to restoring classic interface in Firefox 91 ESR

Thank you


pic from 1993, new guitar day.

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#3 2023-04-12 12:32:38

Altoid
Member
Registered: 2017-05-07
Posts: 1,498  

Re: HOWTO - Guide to restoring classic interface in Firefox 91 ESR

Hello:

tylerdurden wrote:

... unhappy with the changes to the Firefox interface in recent versions ...

Indeed.
Very much so.

It made me rip it out and install Palemoon but it also started giving me all sort of grief.
eg: issues with log-in to accounts and very high CPU usage.

tylerdurden wrote:

... posting this quick guide ...

Thanks for that.

The main issue I have with Firefox is the way it started opening the drop down menus from the menu bar.
ie: right below the addresss bar.

My menu bar is very populated with both direct links (starting from the left end) and folders (all after the direct links).
A couple of the folders also having sub-folders and contain a lot of links.

I have a three monitor setup, my main working monitor being the centre one.

At one point (cannot recall when), Firefox started to behave differently.
ie: Up to then, Firefox knew it was in the centre screen and behaved accordingly, respecting the limits of the screen.

When things changed, on opening up a folder from the menu bar and then a sub-folder, the drop-down did not respect the limits of the screen the Firefox window was on, specifically the right limit.

The new behaviour was to open up towards the right edge of the screen, making all the content of the sub-folder invade the centre right screen.

It makes it very annoying and hard to read.
It also happens if I open Firefox in the centre left screen.

The only way it does not happen is if I open Firefox in the centre right screen.

Curiously enough, Palemoon does not suffer from this problem.

As a work-around, I could move the folders to the extreme left of the menu bar.
But I am not used to working like that.

Have you found something to solve this new and annoying behaviour?
I've searched all over to no avail.

Thanks in advance.

Best,

A.

Last edited by Altoid (2023-04-12 12:42:44)

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#4 2023-04-14 22:27:56

hunter0one
Member
Registered: 2021-12-31
Posts: 68  

Re: HOWTO - Guide to restoring classic interface in Firefox 91 ESR

Thanks for this. This looked so much better.

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#5 2023-06-28 01:07:40

tylerdurden
Member
From: /home
Registered: 2018-07-16
Posts: 39  

Re: HOWTO - Guide to restoring classic interface in Firefox 91 ESR

Altoid wrote:

Have you found something to solve this new and annoying behaviour?
I've searched all over to no avail.

Not sure I can help... Sorry!

Other than that, I'm glad to report the classic interface hack still works in Firefox ESR 102. Or, at any rate, if you keep using profiles created with Firefox 91. Hopefully that'll remain the case with future releases. If not, I guess I may have to consider Palemoon as well...

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#6 2023-06-30 09:17:13

soren
Member
Registered: 2023-04-30
Posts: 123  

Re: HOWTO - Guide to restoring classic interface in Firefox 91 ESR

If you want a completely square Firefox browser theme, try this one. It removes every single rounded corner from Firefox.

https://github.com/leadweedy/Firefox-Proton-Square

I dislike the rounded corner hype GUI programming seems to be going these days, screens have always been mostly square by nature of there engineering and putting rounded corners in seems like an unneeded aesthetic in my opinion.

It kind of reminds me of a safety aspect in that they want to make GUI safe by taking off the sharp corners! Mostly hypothetical though!

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#7 2023-07-08 13:09:52

tylerdurden
Member
From: /home
Registered: 2018-07-16
Posts: 39  

Re: HOWTO - Guide to restoring classic interface in Firefox 91 ESR

soren wrote:

If you want a completely square Firefox browser theme, try this one. It removes every single rounded corner from Firefox.

https://github.com/leadweedy/Firefox-Proton-Square

I dislike the rounded corner hype GUI programming seems to be going these days, screens have always been mostly square by nature of there engineering and putting rounded corners in seems like an unneeded aesthetic in my opinion.

It kind of reminds me of a safety aspect in that they want to make GUI safe by taking off the sharp corners! Mostly hypothetical though!

Couldn't agree more. Thanks for the link, Soren. Will check it out!

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#8 2023-07-09 07:57:19

soren
Member
Registered: 2023-04-30
Posts: 123  

Re: HOWTO - Guide to restoring classic interface in Firefox 91 ESR

Your welcome tylerdurden.

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