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My hide tab bar with one tab code has broken with 76. The tabs themselves remain collapsed, but the bar remains. Here's my userChrome file:

/* Modify to change window drag space width */
:root[tabsintitlebar="true"] #nav-bar{ --window-drag-space-width: 24px }

.titlebar-buttonbox-container{
  position: fixed;
  display:block !important;
  top:0;
  right:0;
  height: 40px;
}
#toolbar-menubar[inactive] > .titlebar-buttonbox-container{ opacity: 0 }

:root[sidemode="maximized"] > #navigator-toolbox{ padding-top: 8px !important; }
:root[sizemode="maximized"] .titlebar-buttonbox-container{ top: 8px }

:root[uidensity="compact"] .titlebar-buttonbox-container{ height: 32px }
.titlebar-buttonbox-container > .titlebar-buttonbox{ height: 100%; }
#titlebar{
 -moz-box-ordinal-group: 2;
  -moz-appearance: none !important;
}
:root[tabsintitlebar="true"] #nav-bar{
  padding-right: calc(138px + var(--window-drag-space-width,0px));
  padding-left: var(--window-drag-space-width,0px)
}
.titlebar-placeholder,
#TabsToolbar .titlebar-spacer{ display: none; }
/* Also hide the toolbox bottom border which isn't at bottom with this setup */
#navigator-toolbox::after{ display: none !important; }

/* Menubar on top patch - use with Fx65_tabs_on_bottom.css */
/* Only really useful if menubar is ALWAYS visible */

#navigator-toolbox{ margin-top: 22px }
#toolbar-menubar{
  position: fixed;
  display:block !important;
  top: 0px;
  height: 22px;
  margin-top:1px;
  width: 100%;
  overflow: hidden;
}

#toolbar-menubar .titlebar-buttonbox-container{ height: 22px; }
#toolbar-menubar .titlebar-button{ padding: 2px 17px !important;  }

/* This will allow you to MAYBE put some items to the menubar */
#toolbar-menubar > *{ float: left }
#toolbar-menubar .toolbarbutton-1 { --toolbarbutton-inner-padding: 3px }

/* Makes tabs toolbar items zero-height initially and sets enlarge them to fill up space equal to tab-min-height set on tabs */
/* Firefox 65+ only */
/* !!USER!! -  REMOVE ALL BUTTONS you can from the tabs toolbar */

/* Configurable window drag space  */
:root[sizemode="normal"] #nav-bar{ --window-drag-space-width: 20px }

#titlebar{ -moz-appearance: none !important; }
#tabbrowser-tabs, #tabbrowser-tabs > .tabbrowser-arrowscrollbox{ min-height: 0 !important; }
:root:not([customizing]) #tabbrowser-tabs .tabs-newtab-button,
:root:not([customizing]) #TabsToolbar .titlebar-button{
  -moz-appearance: none !important;
  height: 0px;
  padding-top: 0px !important;
  padding-bottom: 0px !important;
  -moz-box-align: stretch;
  margin: 0 !important;
}
#tabbrowser-tabs .tabbrowser-tab{ height: var(--tab-min-height) }
#tabbrowser-tabs .tabbrowser-tab[first-visible-tab="true"][last-visible-tab="true"]{
  visibility: collapse !important;
}

/* Button re-styling */
#tabbrowser-tabs .tabs-newtab-button:hover{ background-color: var(--toolbarbutton-hover-background) }
#tabbrowser-tabs .tabs-newtab-button > .toolbarbutton-icon{
  padding: 0 !important;
  transform: scale(0.6);
  background-color: transparent !important;
}
/* Extra top padding  in maximized window */
:root[sizemode="maximized"] > #navigator-toolbox{ padding-top:7px !important; }
/* Fix window controls not being clickable */
#toolbar-menubar:hover{
  min-height: calc(var(--tab-min-height) + var(--space-above-tabbar) - 1px) !important;
  height: calc(var(--tab-min-height) + var(--space-above-tabbar) - 1px) !important;
  -moz-appearance: initial !important;
}
#nav-bar{ padding: 0 var(--window-drag-space-width,0px) }

/* Hide blue stripe on active tab */
.tab-line[selected="true"] {
  opacity: 0 !important;
}

 #toolbar-menubar, #menubar-items, #main-menubar {
 background-color: #F8F8FB !important;
 background-image: none !important;
}
 #TabsToolbar, #menubar-items, #main-menubar {
 background-color: #F8F8FB !important;
 background-image: none !important;
}

/* Change Color of Active tab */

/* Change Color of Normal Tabs */
tab:not([selected=”true”]) 
{
	background-color: rgb(240,240,245) !important;
	color: black !important;
}

/* Hide solo tab */
#tabbrowser-tabs tab[first-visible-tab="true"][last-visible-tab="true"] {
  visibility: collapse;
}
/* Hide New Tab Button immediately next to solo tab */
#tabbrowser-tabs tab[first-visible-tab="true"][last-visible-tab="true"] + toolbarbutton {
  visibility: collapse;
}

Any help is appreciated.

I have been a "light theme" user for 15+ years. Since updating to 96.0 today, a dark mode spreading across Firefox has been forced onto me, including:

• New tab background
• Background of any tab waiting to load a page
• Google/Youtube background
• Settings/add-ons/password menu backgrounds
• Automatic username/password drop-down background
• Background of the little box that appears on the bottom-left (the one which shows the URL when you mouse over a link)

I am unhappy with this and wish to have my usual theme back. Can anyone please assist?

(In addition, there is some sort of white border around the current tab, which I do not like)

Hi

I recently updated to 78.10.0 vers and now when I try to play Netflix I get the WidevineCdm crash message and Netflix won't play

I have refreshed Firefox and restarted my Mac several times and disabled the Adobe Shockwave player.

Nothing works.

Can you please help me?

Hi everyone,

it's been 2 days now since every time I open Netflix and Amazon Prime videos won't play. A yellow bar saying: "The WidevineCdm plugin has crashed" keeps coming up!

I'm using Firefox and I'm on a MacbookPro.

I've tried everything: restarting/shutting down device; reinstalling Firefox; deleting widevine folder and activate it from the adds on page; tried on other browsers (works on safari but not on chrome); contacted Apple / Netflix / Amazon / Google nobody was able to help; I also ran these websites with my Mac in safe mode...nothing was able to resolve it.

What can I do to fix it please?

This started to happen out of the blue...I haven't installed anything! It was working fine until the day before...

Hi, I've tried enabling Java Script but I must have chosen one of Firefox's browser extensions that is blocking it. I just don't know which one. How do I see those and make changes?

Thanks

There are always PR_END_OF_FILE_ERROR type error given by Firefox when opening secure https:// official web sites of government of India, which end in gov.in Why not firefox browser allow opening such websites which are authenticated government web sites ?

A website I use frequently has recently been causing error; "Application error: a client-side exception has occurred (see the browser console for more information)." to show up when I visit some of their pages but not all.

Example: https://www.guitarcenter.com/Used/Ibanez/RG5121-Prestige-Solid-Body-Electric-Guitar.gc

The page begins to load and then presents this error. Any help would be appreciated.

Please tell me how to change home in Firefox I have changed my computer settings - home into https://www.baidu.com/, but not work. I am not happy and upset. I cannot control my computer and my browser home Please tell me why I cannot change browser home, and how can change it.

Many thanks xuan liu from china 2020-7-17

Several days ago (approximately 12-3-20) my Internet Download Manager add-on stopped working. Removing it and reinstalling it by using a link provided by IDM does not work. It will work only if I open the webpage where I intend to download (e.g.--YouTube) BEFORE I reinstall the add-on and only for as long as that page remains open. Closing the page and then reopening it somehow deactivates IDM, as it will no longer link to the video I want to download. Have tried everything i can think of to solve this, including deactivating all other add-ons and by uninstalling and reinstalling the IDM program itself. I also unchecked the "block popup windows" management tool within Firefox itself. Anyone have any ideas what is happening? Initially, I also received the error message added below, but as far as i can tell, none of my other programs are set to block IDM. The error message no longer appears.

my pc had friend so when i got a new one i lost all of my firefox data, how can i get all of it back so i was forced to start all over, i lost all my, bookmarks, tabs, history and saved passwords