Firefox Support Forum

Hello,

I just upgraded to Firefox 87 and noticed that I wasn't able to go back to the previous webpage by clicking on the backspace button like what I have done in the past if I'm not using a mouse on my laptop and had to click on the back button in the toolbar with the trackpad. I'm not too sure of why that happened with the upgrade and was a little surprised about that. Hope I can be able to get around this in some way if one of you know anything about this. Thanks.

I always relied on the "+" at the right end of tabs to get a New Tab, but it's disappeared, won't come back on reboot, doesn't seem available as a customization. It's not the greatest problem in the world but it is annoying when handy shortcuts disappear!

I have read the same named question that has been archived and have not found a solution to my problem there. I'm using Macro Express to define my own keystrokes which works fine outside of FF. One of the keystrokes I have defined is Ctrl-Shift-k. A suggestion was to disable Developer Tools via about:config -> devtools.enable = false, but when I tried to use my definition of Ctrl-Shift-k, instead FF told me "You activated a Developer Tools shortcut. If that was a mistake, you can close this Tab." when in fact I wanted to have it invoke my own definition.

How can I override this (and other) keystrokes when using FF?

Until yesterday everything I customized for Firefox 89 in June of 2021 and FF 91 in August of 2021 was working fine.

Today I updated to Firefox 96.0 and when I open my Firefox returned to that old visual that I hated

tabs with spaces , but that's not the worst. The worst is the newTab visual that came back to the small and ugly bookmarks of the page we usually navigate. That are set on userContent.css I remember.

I checked some vars at about:config and everything is as it was.

So do I need to set true or false any new var there? These .css files are like they was never read. It looks like to me there is a new var, we need to change it.

What did happen?

• my userChrome.css file content below:

/* Begin - Smart Bookmarks Bar CSS Imports */
@import url("chrome://smartbookmarksbar/skin/global/base.css");
@import url("chrome://smartbookmarksbar/skin/global/mouseover-on.css");
@import url("chrome://smartbookmarksbar/skin/global/hideFoldersNames-on.css");
@import url("chrome://smartbookmarksbar/skin/global/hideNoFaviconNames-on.css");
@import url("chrome://smartbookmarksbar/skin/global/spacing-0.css");
@import url("chrome://smartbookmarksbar/skin/global/autohideBar-off.css");
@import url("chrome://smartbookmarksbar/skin/themes/firefoxDefault.css");
@import url("chrome://smartbookmarksbar/skin/themes/firefoxDefault_mouseover-on.css");
@import url("chrome://smartbookmarksbar/skin/themes/firefoxDefault_mouseover-on_hideNoFaviconNames-on.css");
/* End - Smart Bookmarks Bar CSS Imports */

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");



/*** BEGIN Firefox 77 (June 2, 2020) Override URL bar enlargement ***/

  /* Compute new position, width, and padding */

  #urlbar[breakout][breakout-extend] {
    top: 5px !important;
    left: 0px !important;
    width: 100% !important;
    padding: 0px !important;
  }
  /* for alternate Density settings */
  [uidensity="compact"] #urlbar[breakout][breakout-extend] {
    top: 3px !important;
  }
  [uidensity="touch"] #urlbar[breakout][breakout-extend] {
    top: 4px !important;
  }

  /* Prevent shift of URL bar contents */

  #urlbar[breakout][breakout-extend] > #urlbar-input-container {
    height: var(--urlbar-height) !important;
    padding: 0 !important;
  }

  /* Do not animate */

  #urlbar[breakout][breakout-extend] > #urlbar-background {
    animation: none !important;;
  }

  /* Remove shadows */

  #urlbar[breakout][breakout-extend] > #urlbar-background {
    box-shadow: none !important;
  }

/*** END Firefox 77 (June 2, 2020) Override URL bar enlargement ***/


/*** BEGIN Firefox 89 (June 2, 2021) ***/


/* https://github.com/black7375/Firefox-UI-Fix */

@media (-moz-proton) {

  /* Toolbar Height */
  #TabsToolbar
  .toolbar-items, .tabbrowser-tab,
  .titlebar-buttonbox-container {
    max-height: 34px !important;
  }

  :root[uidensity=compact] #TabsToolbar,
  :root[uidensity=compact] .toolbar-items, .tabbrowser-tab
  :root[uidensity=compact] .titlebar-buttonbox-container {
    max-height: 30px !important;
  }
  :root[uidensity=touch] #TabsToolbar,
  :root[uidensity=touch] .toolbar-items, .tabbrowser-tab
  :root[uidensity=touch] .titlebar-buttonbox-container {
    max-height: 42px !important;
  }

  
}  
  

/*** END Firefox 89 (June 2, 2020) ***/

/*** BEGIN Firefox 91 (August, 2021) ***/
/*** Tighten up drop-down/context/popup menu spacing ***/

menupopup > menuitem, menupopup > menu {
  padding-block: 3px !important;
}
:root {
  --arrowpanel-menuitem-padding: 4px 8px !important;
}


/*** END Firefox 91 (August, 2021) ***/

• and my userContent.css file content below:

/*AGENT_SHEET*/

/* Firefox 57+ userChrome.css tweaks ************************************************************/
/* code mostly taken from 'Classic Theme Restorer' & 'Classic Toolbar Buttons' add-ons **********/
/* by Aris (aris-addons@gmx.net)*****************************************************************/
/* Github: https://github.com/aris-t2/customcssforfx ********************************************/
/************************************************************************************************/

/*************************************************************************************************

  ENABLING options: remove the combination of / and * before @import
  DISABLING options: add the combination of / and * before @import
  
  Some @import features might not work properly on macOS and Linux -> Firefox bug
  
  CSS tweaks won't work, if @namespace references are used inside .css files!

*************************************************************************************************/

/************************************************************************************************/
/* about:addons *********************************************************************************/
/************************************************************************************************/

/* NOTE: 'Version number for add-ons' will stop working soon, because Mozilla is going ***********
		 to drop XBL support: see https://bugzilla.mozilla.org/show_bug.cgi?id=1397874 **********/

/* version number for add-ons *******************************************************************/
@import url(./css/aboutaddons/addonlists_show_addon_version_number.css); /**/

/* addons page appearance - only use one at a time **********************************************/
@import url(./css/aboutaddons/addons_manager_alternative_appearance.css); /**/
/* @import url(./css/aboutaddons/addons_manager_alternative_appearance_aero.css); /**/	/* <-- AERO colors */

/* compact item lists - only use one at a time **************************************************/
/* @import url(./css/aboutaddons/addonlists_compact.css); /**/
/* @import url(./css/aboutaddons/addonlists_compact_more_compact.css); /**/

/* other settings *******************************************************************************/
/* @import url(./css/aboutaddons/addonlists_only_show_buttons_on_hover.css); /**/
/* @import url(./css/aboutaddons/addonlists_replace_button_labels_with_icons.css); /**/
@import url(./css/aboutaddons/description_page_alternative_content_order.css); /**/
@import url(./css/aboutaddons/recentupdates_category_always_visible.css); /**/
/* @import url(./css/aboutaddons/search_category_always_visible.css); /**/


/************************************************************************************************/
/* about:preferences ****************************************************************************/
/************************************************************************************************/

/* preferences page appearance - only use one at a time *****************************************/
@import url(./css/aboutpreferences/preferences_alternative_appearance.css); /**/
/* @import url(./css/aboutpreferences/preferences_alternative_appearance_aero.css); /**/	/* <-- AERO colors */
/* @import url(./css/aboutpreferences/preferences_alternative_appearance_v2.css); /**/


/************************************************************************************************/
/* about:newtab / about:home ********************************************************************/
/************************************************************************************************/

/* @import url(./css/aboutnewtab/dark_appearance.css); /**/
@media (-moz-proton) {
  @-moz-document url("about:home"), url("about:newtab") {
    /** Activity Stream - Search Focus Border: like URL ***********************/
    /* At DarkMode, Color */
    body[style*="--newtab-background-color:rgba(28, 27, 34, 1);"],
    body[style*="--newtab-background-color:rgba(42, 42, 46, 1);"] {
      /* inner */
      --newtab-focus-border: rgba(0, 221, 255, 0.5) !important; /* Original: #B5D3FF, Better color-mix(in srgb, #B5D3FF 70%, transparent) */
      --newtab-focus-border-selected: rgba(0, 221, 255, 0.5) !important; /* Original: #B5D3FF */
    }

    /** Activity Stream - Web Site Icon: full size ****************************/
    /* Remove Firefox Logo on new Tabs
    div.logo-and-wordmark {
      display:none !important;
    }
    */
    .tile {
      width: 100px !important;
      height: 100px !important;
    }
    .top-site-icon .rich-icon {
      width: 100px !important;
      height: 100px !important;
    }
    .top-site-outer .tile .icon-wrapper {
      width: 100px !important;
      height: 100px !important;
    }
  }
}



/************************************************************************************************/
/* WEB CONTENT **********************************************************************************/
/************************************************************************************************/

/* top level image on white background (can sometimes cause glitches) - only use one at a time **/
/* @import url(./css/webcontent/toplevel_image_classic_v1.css); /**/
/* @import url(./css/webcontent/toplevel_image_classic_v2.css); /**/


/************************************************************************************************/
/************************************************************************************************/
/************************************************************************************************/

Thanks in advance.

Hi, I am using the dark mode in firefox which is god sent boon to persons having glaucoma, with dark mode in firefox and dark reader add on. This was going well and after a recent update, I could not find it working. The dark mode is enabled and dark reader was there, but the browsing pages only shows in white. Has firefox changed anything recently to have this issue? If I miss something would the experts say, how to get back my dark browsing experience in all sites. If I find anything not visible in some sites, I used to go the windows properties and change the contrast theme to windows basic blue theme and then switched back to dark theme. this was helping the glaucoma persons very much. please, say how to solve this problem

I was following this reddit thread on how to remove the "your camera and microphone are being shared" popup, but it's having no affect.

I have set `toolkit.legacyUserProfileCustomizations.stylesheets` to true.

Here's the full contents of the userChrome.css file: ```

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

#webrtcIndicator {
  display: none;
}

```

In Ubuntu 18.04, I bring up a new page, click in the search bar in the middle of the page. Then when I start typing it jumps to the address bar although I have already placed and preferred the search bar to the right. No! NO! NO!

I use Duck Duck Go but Google does the same.

It is bad enough that the upgrade was automatically loaded but on top of that, changing preferences including dumping my home page. Change privacy settings without asking ( to a lower level on top of that ).

Really POOR form.

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

PlacesToolbarItems > .bookmark-item[container][label="Complete Tasks" i] {fill: #FF0000 !important;} PlacesToolbarItems > .bookmark-item[container][label="Medical Coding" i] {fill: #FF0000 !important;} PlacesToolbarItems > .bookmark-item[container][label="Bodybuilding" i] {fill: #FF0000 !important;}

This isn't that important, but I was just experimenting to see if changing a few folder colors would be of any benefit to me. And the above code that I tried didn't work. I'm guessing that something changed with Mozilla Firefox in the last 1-1.5 years, and I have a feeling that if I dig into https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors for hours or even days I won't be able to figure out what I need to change. Anyone know what the new code should be? Thanks in advance.

So I just updated to version 106.0.1, and I noticed something new in the far right corner of the screen, an arrow with a dropdown function listed as view all tabs. I have no need for this and tried to use the customize toolbar option to remove it. It did not work. How do I get rid of this thing? It's just kinda taking up space on the screen as I doubt I'm ever gonna use it.

Any tips here?

I save a lot of images from certain sites, and prior to me finally installing the latest update because your stupid system notifies me every few hours of an update and I dismiss 20 times a day for weeks on in.... I found that this latest update ruined firefox even further because now every single time I download an image, it pops the stupid download list on top of everything till I click somewhere instead of silently downloading like it used to do. I found no options at all for disabling this new terrible feature that you for some reason forced on us against our will yet again.

How to change the Tab color for inactive tabs?

I have a userChrome file and have been able to change the color of the active tab but cannot do so for the inactive tab. The inactive tab color blends into the toolbar color. If I move my mouse cursor over it changes to a slight darker gray color.

Active tab color. I made mine a off white color:

.tab-background[selected="true"] {

   background-color: #f9f7f1 !important;

}

So basically I like redesigning my macs look every few months and i want to add a picture to the start screen, I want to have the original one - it still saying Firefox however I want a background behind it, much like chrome. I found a solution but it involved a lot of code and doing some really confusing things so what should I do? I don't want to install any add-ons. Also if anybody find the coding solution anywhere could you please re-explain it to me? Thanks :)

Before update when I clicked in PDF viewer toolbar download button it opened a screen to open with, right now it only download a file. I want it back. I have firefox as pdf viewer, but sometimes I need to open file with Acrobat DC, that's when I did click download button. It works on other computer like before, it is before firefox update.

In my opinion, App Mode is a very useful feature that allows installing a website as an app. However, I am unable to see any option related to App Mode in 95.0.2 (64-bit). Could you please help me about this issue?

Many file types are no longer listed under Settings > Applications>Content Type at about:preferences#general. I used to be able to click on a file in an email like a Word or Excel document, and it would come up on my screen. Now Firefox asks me to Save them. I don't want to automatically save files without first looking at them. How can I get those file types in the Application list again?

I have attached a pic of the file types I have left to chose from. There used to be a lot more. How can I get back all the missing choices I have had there for years?

After a forced update, firefox stopped giving the popup that lets you choose what to do with the file.

A temporary fix is to go into options and set "Always ask you where to save files", however this is clunky, and much much slower, so is there any way to get this popup back?

If not, then i will have to migrate to a different browser for safety, since this new "Feature" can be easily abused by hackers and malicious websites.

Hello! I am using the userChrome.css file to hide the nav bar (# nav-bar) and show it when hovering the tabs.

The following code works a bit, but when I open the developer tools they overlap.

# nav-bar {
   z-index: -1;
}

# navigator-toolbox: hover # nav-bar {
   z-index: 1;
   background-color: rgba (0,0,0,0.8)! important;
}

#browser {
   margin-top: -45px;
}

Any advice to achieve the expected functionality? Thank you

gif showing the problem: https://s10.gifyu.com/images/firefox-customization-problem.gif

show close button ("x") on hover over a tab without having it in the foreground. Basically I wish to have the middle mouse click ability with a mouse which does not have said button.