Firefox Support Forum

Hey there, awesomes! I'd like to change my Firefox pdf viewer's background color (both sides of the pdf) to dark, currently it shows light gray (see `background_bg.png`). And here is effect I want it to look like (see screenshot from Chrome `wished_bg.png`). Thanks in advance (:

PS: I don't want to change my theme to dark. It seems I have to change my css, but I dunno which & how.

I have a custom add-on that I'm working on for my team. It's hosted internally on a server signed by our company's internal CA. The add-on is signed by Mozilla, but not hosted on AMO.

I am on the latest version of Fedora running Firefox 81.0. In the browser console I get this error relating to the URL for the addon when I tell Firefox to check for updates: "Certificate issuer is not built-in".

I have the company CA installed and when I navigate to the site in the browser, Firefox recognizes the cert. I've done some reading on the subject and seen several threads about it. I've tried a few things already, but most of the threads where a couple of years old.

I'm asking the question here hoping to figure out what the current state of the problem is and which settings I should tweak to have it trust the company CA or what my options are.

Thank you in advance for any support on the issue.

I am using tab-on-bottom code in userChrome.css that I got from the web.

1. There is a highlight feature of the tabs. A mouse-over will do a subtle enhancement of the top portion of the line delineating of the tab. 2. The active tab has a blue bar at the top portion of the line delineating the tab.

I want both to go away. I have code to highlight the background color of the active tab and need no other highlight function.

The userChrome.css is below.

Thanks, Gert

/* TABS: bottom - Firefox 65 and newer; should for now work with XUL @namespace */

1. TabsToolbar {

 -moz-box-ordinal-group: 1000 !important;
 display: block !important;
 position: absolute !important;
 bottom: 0 !important;
 width: 100vw !important;

}

1. tabbrowser-tabs {

 width: 100vw !important;

}

• |*:root:not([chromehidden*="toolbar"]) #navigator-toolbox {

 padding-bottom: calc(var(--tab-min-height) + 1px) !important; /*adjust*/

}

/* position Tab bar with Menu bar and Title bar hidden for Firefox 65-73 - omit in Firefox Nightly */

• |*:root[tabsintitlebar]:not([inFullscreen="true"]):not([sizemode="maximized"])

1. toolbar-menubar[autohide="true"] ~ #xTabsToolbar{

 bottom: var(--tab-min-height) !important;
 padding-top: calc(var(--tab-min-height) - 0px) !important; /*adjust*/

}

/* TABS: height */

• |*:root {

 --tab-toolbar-navbar-overlap: 0px !important;
 --tab-min-height: 30px !important; /*adjust to set height or omit to use density*/
 --tab-min-width:  80px !important; /*adjust to set width or omit to use default*/

}

1. TabsToolbar {

 height: var(--tab-min-height) !important;
 margin-bottom: -0px !important; /*adjust*/
 background-color: #F5F6F7 !important;

}

/* caption buttons - hide */

• |*:root[tabsintitlebar]:not([inFullscreen="true"])

#toolbar-menubar[autohide="true"] ~ #TabsToolbar
.titlebar-buttonbox-container {display: none !important;}

/* Change Color of active tab */ .tab-background[selected="true"] {

   background-color: #A8FFAD !important;
   background-image: none !important;

}

/* Rounded corners on tabs firefox 58 */ /* http://forums.mozillazine.org/viewtopic.php?f=38&t=3037688# */ .tabbrowser-tab::after, .tabbrowser-tab::before {

  border-left: none !important;

} .tab-background {

 border-radius: 6px 6px 6px 6px !important;
 border-image: none !important;
 border-left: 1px solid !important;
 border-right: 1px solid !important;
 border-top: 1px solid !important;
 border-width: 1px !important;
 border-color: #000080 !important;
 background-attachment: none!important;
 background-color: #DAD7D0 !important;
 background-image: none !important;

}

/* Menu bar (File Edit View) height and background color */

1. toolbar-menubar, #menubar-items, #main-menubar {

 height: 30px !important;
 background-color: #DAD7D0 !important;
 background-image: none !important;
 font-size: 14px !important;

}

/* Menu bar (File Edit View) text color */ .menubar-text, .tabbrowser-tab:not([selected="true"]) tab-label {

 color: #080808 !important;

}

/* Use Normal top and bottom padding for Compact */

1. PlacesToolbarItems .bookmark-item {

 padding-top: 10px !important;
 padding-bottom: 6px !important;

}

Can I turn off the "control media playback via hardware media keys on a keyboard or headset or virtual media control interface" function? (Firefox 81.0, Windows 10)

there is no such icon https://support.mozilla.org/ru/kb/pochemu-ya-dolzhen-kliknut-chtoby-aktivirovat-plag

Everytime I open the suggestions in the address bar Search with Google or Search with Amazon appear at the top. You cannot remove them by using the 'forget about this site' feature and if you change the browser.urlbar.openViewOnFocus to 'False' you don't get the suggestions. Can you tell me how to permanently remove Search with Google or Search with Amazon from the suggestions. Thank you.

Please make videos stop playing when I go to a website. Now (25/9/20) pop out videos have started cluttering my screen and are difficult to shut down. I do not want picture in picture and I do not want videos to play automatically. I have been through all the settings, but nothing makes any difference.

I'm trying to browse Reverb.com, and when I click on an item I want to look at, firefox opens in a new tab. This just started today after updating the Facebook Container add-on, and even after disabling the add on, the problem persists. I completely exited out of firefox and got back on, and Reverb is doing the same thing still. I don't want new tabs to keep opening every time I click on a new item, but to just take me to that page like normal.

I can't find anything in the options for firefox like keybinding or anything, and none of the other settings seem like they would address this issue.

Thanks for any and all help.

Firefox was recently changed where "Close Multiple Tabs" is now a drop-down that contains the option "Close tabs to the right" is there a way to eliminate the drop-down and just have the "Close tabs to the right" option available when right clicking a tab?

Pictures added. Thanks!

This is driving me nuts.

My desired behavior is that, when I middle-mouse-click on a hyperlink, Firefox launches a new window (not a tab) with that URL.

This is how it was working before a power interruption forced my computer to restart tonight, and my desired behavior has gone away.

The middle mouse button works for other functions; and, middle-clicking on bookmarks in my bookmark bar does launch a new window with that bookmark as expected. However, middleclicking a hyperlink does nothing.

I have browser.tabs.opentabfor.middleclick = false and in the options menu, "open links in tabs instead of new windows" is unchecked. Additionally I have set browser.link.open_newwindow = 2.

Can anyone help me here? This is driving me slightly batty.

I went in to Privacy & Security but couldn't find Forms and Autofill section there. I was using en-CA version but just switch to en-US version. Can't find it in both version.

Hi, This latest upgrade has removed the ability to open new windows in another tab its either off or new tab/window with no ability to select which I do prefer to have all my pages open in new tabs not new pages every time have I missed something? or is there a way to get this altered in future versions I have now had to resort to another browser which does allow this