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I like Firefox Quantum, but not the changes it made to the native dark theme.

  • 7 replies
  • 21 have this problem
  • 14 views
  • Last reply by Phaewryn

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The other day I discovered a new browser called Firefox Quantum had been released by Mozilla. "Exciting", I thought to myself. So I downloaded and installed it. I wish I had known it would completely replace my existing installation before hand. I would have sandboxed the installation to check it out. It's no big deal though, I like the new Firefox... However....

I use windows 10 64 bit and I think I was using Firefox 52 something before I upgraded to Quantum. This version of firefox had a simply beautiful native dark theme with lots of dark grays. which you could turn on by going here: Menu > Customize > Themes > Dark.

Firefox quantum ALSO has a dark theme, in exactly the same place as the overwritten installation. Firefox quantums dark theme however, is BLACK, and looks like a knock off of microsoft EDGE. I really REALLY REALLY want my old dark theme back :(

Is it possible to keep Firefox Quantum without committing to the ugly EDGE theme?

The other day I discovered a new browser called Firefox Quantum had been released by Mozilla. "Exciting", I thought to myself. So I downloaded and installed it. I wish I had known it would completely replace my existing installation before hand. I would have sandboxed the installation to check it out. It's no big deal though, I like the new Firefox... However.... I use windows 10 64 bit and I think I was using Firefox 52 something before I upgraded to Quantum. This version of firefox had a simply beautiful native dark theme with lots of dark grays. which you could turn on by going here: Menu > Customize > Themes > Dark. Firefox quantum ALSO has a dark theme, in exactly the same place as the overwritten installation. Firefox quantums dark theme however, is BLACK, and looks like a knock off of microsoft EDGE. I really REALLY REALLY want my old dark theme back :( Is it possible to keep Firefox Quantum without committing to the ugly EDGE theme?

Chosen solution

Right, I ws wondering if one of those has the bluish-black color that you're looking for.

You could also try modifying the theme with userChrome.css. Follow the directions here: https://www.userchrome.org/how-create-userchrome-css.html to create a userChrome.css file. When you get to the "adding style recipes to userChrome.css", you could try something like this:

.tab-background[selected="true"]:-moz-lwtheme {
background: rgb(20, 53, 84) !important; /* this sets the color of the tab background */
}
.tab-line[selected="true"] {
background-color : rgb(157, 191, 214); /* this sets the color of the line above the tab */
}

:root:-moz-lwtheme-brighttext {
  --chrome-background-color: rgb(28, 33, 38);
  --chrome-secondary-background-color: rgb(43, 50, 61) !important;
}
Read this answer in context 👍 6

All Replies (7)

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There are many third-party themes that you can install here: https://addons.mozilla.org/en-US/firefox/search/?q=dark+theme&type=persona . It's possible that one of those is closer to what you're looking for.

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Those "themes" appear to be graphics that get layered behind the default Firefox theme.

See the photo for an example of the pre-quantum "native dark firefox theme" I referred to.

It has flat tabs and icons just like quantum does, but the colors and overall feel is less stark and much more comfortable

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Chosen Solution

Right, I ws wondering if one of those has the bluish-black color that you're looking for.

You could also try modifying the theme with userChrome.css. Follow the directions here: https://www.userchrome.org/how-create-userchrome-css.html to create a userChrome.css file. When you get to the "adding style recipes to userChrome.css", you could try something like this:

.tab-background[selected="true"]:-moz-lwtheme {
background: rgb(20, 53, 84) !important; /* this sets the color of the tab background */
}
.tab-line[selected="true"] {
background-color : rgb(157, 191, 214); /* this sets the color of the line above the tab */
}

:root:-moz-lwtheme-brighttext {
  --chrome-background-color: rgb(28, 33, 38);
  --chrome-secondary-background-color: rgb(43, 50, 61) !important;
}
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Wow, that's great! I see where it's changed the color of the tabs to a faded dark blue. Although, the tab line ( which I imagine is the solid 2px thick line at the top of selected and hovered tabs ) does not show any change no matter what I set the color to.

I wonder if there is a complete reference guide for using the userChrome file.

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Although, the tab line ( which I imagine is the solid 2px thick line at the top of selected and hovered tabs ) does not show any change no matter what I set the color to.

Oh, sorry, that needs !important added to it, so the correct CSS should be this:

.tab-line[selected="true"] {
background-color : rgb(157, 191, 214) !important;
}

There's not really a reference guide, since you're basically just adding code to Firefox that gets loaded on startup. This website has a bunch of useful resources for learning how use it.

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Thanks. I've selected your response from earlier as the answer to this thread. If you could do me a huge solid and have a look at my follow up question, I'd be very very greatful. https://support.mozilla.org/en-US/questions/1188413

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user1929 said

You could also try modifying the theme with userChrome.css. Follow the directions here: https://www.userchrome.org/how-create-userchrome-css.html to create a userChrome.css file. When you get to the "adding style recipes to userChrome.css", you could try something like this:

BRILLIANT! Thank you!