userChrome.css is a CSS file Firefox users can write to change the default appearance of the browser.
userChrome.css is a CSS file Firefox users can write to change the default appearance of the browser. More on it at userchrome.org.
Questions tagged [userchrome.css]
20 questions
6
votes
3 answers
Firefox 89 doesn't see userChrome.css even set toolkit.legacyUserProfileCustomizations.stylesheets=true
Firefox has just updated and now it doesn't see userChrome.css, toolkit.legacyUserProfileCustomizations.stylesheets is set to true. I'm trying to hide the scrollbar by
html {
scrollbar-width: none !important;
}
and everything worked fine…
Kalich
- 87
- 2
- 6
5
votes
2 answers
Why does Firefox name its UI interface configuration file : userChrome.css?
Why does Firefox name its UI interface configuration file : userChrome.css ? why not userFirefox.css ?
Raptor
- 53,206
- 45
- 230
- 366
2
votes
1 answer
Modifying Mozilla Thunderbird-68 buttons with userChrome.css
Since the CustomizeMyBird plugin is no longer supported in Mozilla Thunderbird 68, my question is how to manually modify these buttons:
New Thunderbird 68 - bad:
Old Thunderbird 60 with Classic Toolbar Restorer - good:
I have enabled…
Ernestas Gruodis
- 8,567
- 14
- 55
- 117
2
votes
2 answers
prevent firefox from flashing white on loading page
How can I prevent Firefox from flashing a white page before it loads a webpage? I often use dark themes with Firefox (with the Stylus extension), and it is annoying to see a white flash before it loads the dark webpage. Is there some way to change…
azim58
- 21
- 1
- 3
1
vote
1 answer
What part of this UserChrome.css file's meaning has changed in Firefox 113?
My UserChrome.css file is as follows:
/*@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");*/
@namespace xul "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
@namespace html…
J. Mini
- 1,868
- 1
- 9
- 38
1
vote
1 answer
Customise Firefox extension using chrome/userChrome.css
I have foxclocks installed "{d37dc5d0-431d-44e5-8c91-49419370caa1}.xpi"
I have enabled use of chrome/userChrome.css and have hidden menu items so I know it is working.
I like to hide the "closer" in fox clocks but how do I reference it in…
zackhalil
- 455
- 3
- 14
1
vote
1 answer
How to override this single selector within a CSS ruleset (Firefox web browser user interface)?
Firefox 89 includes many changes to the web browser's UI.
One of the benefits of the new UI is that tabs can show a secondary information row to indicate, for example, if media is playing in a tab.
Unfortunately, when the highly-desirable compact…
RockPaperLz- Mask it or Casket
- 5,361
- 10
- 45
- 69
1
vote
1 answer
CSS variables in Firefox's userChrome.css do not take effect
I'm using Firefox 72 on FreeBSD and configure some style in userChrome.css. This works fine. As an example, I can make the label of the "File" menu in the menu bar red with
@namespace…
Jens
- 69,818
- 15
- 125
- 179
1
vote
1 answer
Firefox - edit userchrome.css
I recently switched to Firefox from Chrome and I love its performance (I enabled WenRender).
There's a little thing that I miss: in Chrome I'm able to right-click on a folder in the bookmark toolbar and select "open all in new window". I know I…
Dolphin975
- 157
- 2
- 10
1
vote
1 answer
Firefox userChrome.css window focus selector
Is there a CSS selector I can use in userChrome.css to change the text color of Firefox when the whole browser window loses focus?
I've tried:
window:focus element { color: #aaa; } /* does nothing */
window:active element { color: #aaa; } /*…
Robbie Wxyz
- 7,671
- 2
- 32
- 47
1
vote
2 answers
Firefox userChrome.css tooltip unwanted white border
in my userChrome.css:
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */
tooltip {
padding: 0px !important;
padding-left: 0px !important;
background-color: #000000 !important;
…
Mark Robbins
- 2,427
- 3
- 24
- 33
0
votes
0 answers
userChrome.css change a specific non-special folder icon (Thunderbird >= 100)
In Thunderbid (102) I have numerous sub-folders under "Local Folders / Archives", such as "Friends", "Business" ...
I would like to be able to set a specific icon for each one of them.
In userChrome.css I have been able to change the icon for the…
Gilles Maisonneuve
- 123
- 1
- 7
0
votes
0 answers
Overriding font-family via userContent.css doesn't work
I'm trying to override font-family via userContent.css in all web pages. My ultimate goal is to only target Persian/Arabic text in the css but that's a separate issue.
I started with a simple global rule below but Firefox does not pick it up:
* {
…
Milad
- 4,901
- 5
- 32
- 43
0
votes
0 answers
How to change the UI on specific url/websites in Firefox?
What i'am trying to do is to remove, or at least hide the horizontal scrollbar in Firefox when i visit a specific website/url. I found code which hides the bottom scrollbar, but on all websites:
:-moz-any(#content,#appcontent) browser{
…
0
votes
1 answer
Can you customize the alert box in userChrome.css?
I recently discovered FireFox's userChrome.css where you can cutsomize about everything with CSS. I tried googling how I can customize the alert box (when I use 'alert()') but I can't find anything. Is this possible?
Parking Master
- 551
- 1
- 4
- 20