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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 ?

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.

When I attempt to access several websites, I am prompted to turn off my ad blocker. As I have not added a third-party software or extension that does such, I assume it is part of Firefox proper. Search as I might, I cannot find any specific reference to such a thing in "Settings". SO...how can I temporarily disable the 'Ad Blocker' device that is part of Firefox? The 'TEMPORARY' part is important, as I do greatly value the function!

I installed the uBlock Origin add on to stop ads while watching youtube. I restarted the computer. uBlock Origin is in Add Ons, and is switched on. However, I am still receiving ads. First ad is before the clip plays. After 5 seconds, I can end the ad. Second ad is really intrusive. It interrupts the clip. Perhaps I misunderstood the capabilities of uBlock Origin, or how to use it. I would appreciate any recommendations Firefox version on my Windows 7 PC is: 79.0 (64-bit) Thanks.

I need to know how to disable a blocker? I am on a Verizon website page and trying to post a review, I get message to "disable ad blocker" before posting my review.

Hi All,

I am planning to get a new computer and I am wondering if I can use Sync to migrate all my numerous bookmarks and passwords over to the new PC?

Or do I need to export all this info into a file or files and then load that on my computer?

Also if I can use Sync to move all my bookmarks and passwords over... can I store this information on the hard drive of the new pc or is it stored on the cloud?

Can't access my gmail account of Firefox; it wants me to .Add Gmail to your Google Account' . I can access my gmail on Chrome. How do I get Firefox on board? Thanks!

I do NOT appreciate that Mozilla now forces me to use the FireFox home page (or else literally nothing - a blank page) for my new tabs. I want to use the same custom page I have set up as my home page, but since the last update, that page only shows in a new window, not on new tabs. Is there a workaround for this? I use multiple tabs within the same window heavily, and having FireFox abruptly override a customization I have already set up and been using for years, that works best for me, is seriously pissing me off. I know there is a plugin to se new tabs, but I already have several plugins and would prefer not to add more.

even when disabled my background colour keeps reverting to black in firefox I have disbled dark option in themes but it still reverts. I have set text to black and background to white.