Here are some of my Firefox about:config changes (that are not so obvious to be changed) that you may like:
- Disable Pocket native extension (button):
extensions.pocket.enabled to false

- Change UI to compact mode (customization):
browser.uidensity to 1 and
browser.compactmode.show to true

- Remove "Inspect accessibility Properties" (context menu):
devtools.accessibility.enabled to false

- Remove Screenshot native extension (button, context menu):
extensions.screenshots.disabled to true

- Remove AI chatbot integration (sidebar, context menu):
browser.ml.chat.enabled to false

- Remove browser translations (button, context menu):
browser.translations.enable to false

- Remove popup asking to enable DRM (ui):
browser.eme.ui.enabled to false

- Disable expensive backdrop filter CSS property (performance, recommended for old and slow computers only):
layout.css.backdrop-filter.enabled to false

- To enable Hardware Decoding for HEVC:
go to about:support, scroll down to Media section, and click the Install link (will redirect to Microsoft Store)

The items in red on picrel are the elements that will be affected by these changes.
If you don't like some changes, you can click the "left-curved arrow" button in the about:config page to reset that setting to default.

Let me know if I'm forgetting something, or if you want to know how to change or remove something else from Firefox via advanced settings.
There are many settings that I didn't include because they can be easily changed in the about:preferences UI-wise.

>>105578099 (OP)
Czech'd and it looks much better.

I won't ever touch ff again. I hope mozilla dies, but I will use this to trim some fat from my dedicated floorp 4chan shitposting browser on Windows if I ever boot into that again.
Thanks, OP.

Disable Tab groups:
browser.tabs.groups.enabled

Disable AI/ML from tab groups:
browser.tabs.groups.smart.enabled to false

>>105578136
You're welcome! I'm glad to help.

>>105578099 (OP)
>>105578136
>>105578162
BE BRAVE NOT COPE
just download in 2 clicks
brave.com/download

Some more (most of them can be disabled via about:preferences, but not all of them, so if you already disabled them in the settings UI page, it should be fine. But you can check from here to be sure):
Disable Sponsored URLs in Address Bar:
browser.urlbar.sponsoredTopSites = false
browser.urlbar.showSponsored = false

Reduce Telemetry and Data Collection:
datareporting.healthreport.uploadEnabled = false
toolkit.telemetry.enabled = false
toolkit.telemetry.unified = false

Disable Firefox View Button
browser.tabs.firefox-view = false

Prevent Suggestions from Mozilla in Address Bar
browser.urlbar.suggest.quicksuggest.nonsponsored = false
browser.urlbar.suggest.quicksuggest.sponsored = false

Enable JPEG XL Support (modern image format)
image.jxl.enabled = true

>>105578233
powerful post sir

you forgot to install the ff lepton theme
https://github.com/black7375/Firefox-UI-Fix/tree/photon-style

bash -c "$(curl -fsSL https://raw.githubusercontent.com/black7375/Firefox-UI-Fix/master/install.sh)"


pick "photon"

then install my gruvbox sexy theme
>https://addons.mozilla.org/en-US/firefox/addon/awesome-gruvbox/

>>105578099 (OP)
Today OP was not faggot. Thank you OP. Thread archive for saving.

https://desuarchive.org/g/thread/105578099/

>>105578611
lookz amazing

To fix Firefox font rendering issues introduced in later versions (I updated from 131 to current) and the fonts were all slightly blurry and mismatched.
Accidentally deleted my comparison image but here's the fix

Set
>gfx.font_rendering.cleartype_params.force_gdi_classic_for_families
To
>Arial,Consolas,Courier New,Microsoft Sans Serif,Segoe UI,Tahoma,Trebuchet MS,Verdana

And
>gfx.font_rendering.cleartype_params.force_gdi_classic_max_size
To
>15

Also make sure you have
>gfx.font_rendering.cleartype_params.rendering_mode
At the default
>-1

>>105578655
ty qt

>>105578233
It’s literally Chrome, stop pretending that it’s not Chrome.

>>105578099 (OP)
These have no guarantee of continuing to work, why don't you just switch to a real browser that doesn't need tinkertranny hacks to not be shit?

Oh so tab groups are a thing now. I'm having trouble creating one because the tabs keep shifting around under the one I'm dragging. I wonder if it's because of my custom compact mode userchrome.css.

>>105580333
They will work forever. In fact, we will beable to remove the extension button next update. Mozilla wants the browser to be customizable. Things that cant be changed here can be changed with a userChrome.css file.

>>105578099 (OP)
Hmm, most of these seem to already be applied in Zen. Pretty cool.

>>105578162
Why would I disable tab groups? I have waited almost a decade for this feature to return.

>>105580850
some might find it annpting to want tp rearrange tabs and have Firefox group them unintentionally.
Or you may just want to keep it enabled, and have control over the AI aspect of it, thus 2 settings.

But it's a preference. I personally have it enabled because it haven't got in my way yet, bit I haven't really found an use for it yet.

Why doesn't Firefox switch to Libération/Croscore fonts by default? Tor has already done so because it's one fewer way you can be profiled. Plus most sites are designed with MS fonts in mind so it might help compatibility.

How do I backup these settings now?

>>105578099 (OP)
>Change UI to compact mode (customization):
>browser.uidensity to 1 and
>browser.compactmode.show to true

haven't tested it but this could make your browser easier to fingerprint if you care about that kind of stuff.
the browser's resolution (which is easy to read by websites) would be just a few pixels more in height.
most people don't use about:config flags, so the custom resolution would make you stand out by a lot.

>right-click on refresh button
>customise toolbar...
enjoy.

>>105581318
You can backup yoir profile folder:
Windows: C:\Users\<YourUsername>\AppData\Roaming\Mozilla\Firefox\Profiles\
macOS: ~/Library/Application Support/Firefox/Profiles/
Linux: ~/.mozilla/firefox/

or if you wanna sync the settings, just mark Settings in the sync options.

>>105580850
How do people use tab groups? I often have lots of cluttered tabs open at once and would definitely use this if it solved my issue

>>105581415
select all the tabs you want with ctrol or alt click, then right click and select Group tabs from the context menu.
Play around a bit until u get used to it, you can do thibgs like hide tab groups and display oy the label to save space.

>>105581557
*display only the label

this is for windows 10 fags

widget.non-native-theme.scrollbar.size.override to 10
widget.non-native-theme.scrollbar.style to 5
widget.non-native-theme.win.scrollbar.use-system-size to false

>>105578099 (OP)
this is great and all, but how do you remove "Add Site" in the context menu when right clicking the url bar.

>>105582487
the only wau to hide it is with userChrome.css. Check how to create the css file, enable the toolkit.legacyUserProfileCustomizations.stylesheets setting and paste the code below:

/* Hide the "Add Search Engine" option in the URL bar context menu */
.context-menu-add-engine {
display: none !important;
}

/* You might also want to hide the separator above it if it appears */
.menuseparator-add-engine {
display: none !important;
}

>>105578099 (OP)
I thought pocket is already on the chopping block

>>105582616
thank you anon, chatgpt gave me a slightly different alternative that was causing issues, but this solution is perfect.

have you also done anything with regards to the sidebar? in librewolf ctrl+h just opens/closes my history, but in firefox it leaves the sidebar open with the same shortcut. ;-;

i'm a recent convert to firefox, coming from chromium. non-gimped adblocking is very very nice, esp when it comes to element picker in ublock origin.

>>105578233
easy (You)s
pic related

>>105582675
You can set
sidebar.revamp
to false to restore to tje previous version of the sidebar where Ctrl + H is toggle.
Or you can try the Sideberry and see if there's an option to toggle with the shortcut (sideberry is very custonizable)

>>105582718
I forgot to mention that sideberry is an extension

Toasting in epic bread!

How to disable the full screen transition in about:config:
full-screen-api.transition-duration.enter 0 0
full-screen-api.transition-duration.leave 0 0
If you want to disable the "example.com is now full screen" message too:

full-screen-api.warning.timeout 0
I prefer to leave the warning on as it is apparently an anti-phishing thing, but I hate the black screen transition.

>>105582718
>sidebar.revamp
thank you once again, anon! all my complaints with firefox, aside from a single bug (https://bugzilla.mozilla.org/show_bug.cgi?id=1955112), are now fixed.

I was gonna make a similar thread myself, glad I noticed this one.

How to properly tell autoplay to fuck off:
media.autoplay.allow-extension-background-pages = false
media.autoplay.block-event.enabled = true
media.autoplay.block-webaudio = true
media.autoplay.default = 5
media.autoplay.blocking_policy = 2

You can reenable permissions on a site by site basis from the button next to the url bar. The change can take a bit of getting used to (you sometimes have to click play multiple times on some websites), but it saved me countless annoyances especially on those god awful YouTube channel pages that just won't shut up no matter what else you try.

>>105582754
I'm glad to help!

>>105582629
Yeah, but it's still going to be around for a while:

>Pocket will no longer be available after July 8, 2025. You can continue using the app and browser extensions until this date. After July 8, Pocket will move into export-only mode. Users can export saves anytime until October 8, 2025, after which user data will be permanently deleted.

>>105581331
this is a schizophrenic mindset anon

>>105578099 (OP)
pocket is dead anyway.

>>105580333
>t. rage troll

>>105578674
>To fix [some bug] introduced in later versions

this is why I use Firefox ESR

>rare
most common about:config tweaks

try harder bot

>>105578099 (OP)
Why would you want to disable the screenshot? It's handy to take a screenshot of a small area.

>>105578674
rendering mode 5 is the best anyway, you just need to enable enhanced_contrast to make it look similar to Chromium's font rendering

>>105581331
this problem is already completely unavoidable if you've moved or resized your taskbar in any way.

>>105583853
win+shift+s drag and drop literally take a screenshot of any small area of anything ever
why would you need firefox to do this for you

>>105578099 (OP)
now show me which setting to change to get rid of the fucking x buttons on my tabs. why anyone ever thought to put these there is beyond me. i have closed hundreds of tabs this way over the years and none of them were intentional.

>>105584005
I don't use windows.

>>105584045
not a windows hotkey anon

>>105584051
Well whatever it's for I don't use it.

>>105581318
You should set these settings in that file
http://www.kb.mozillazine.org/User.js_file
>IA mirror as it's down at the moment
https://web.archive.org/web/20250603144526/https://kb.mozillazine.org/User.js_file

>>105583629
Do better. Oh wait, you can't.

>>105583853
I do it to remove the entry from the context menu (so it's short), also I use the Print Screen key instead so I prefer it turned off.

>>105584019
Enable
toolkit.legacyUserProfileCustomizations.stylesheets
in about:config, then use this userChrome.css:

/*** Hide Tab Close buttons ***/
.tabbrowser-tab .tab-close-button {
display: none !important;
}

>>105578099 (OP)
just use arkenfox desu

>>105578099 (OP)
is it possible to disable tab dimming when not in focus? every css i found online doesn't work, or only works for the current tab. but i want all the tabs (and menu bar, if possible).

>>105586970
ArkenFox changes too many things peole don't want to disable or that are schizo level. These settings are for the average user who just wants to make the browser more clean.

>>105578099 (OP)
Or alternatively you could just use Librewolf which has most of that removed by default

>>105587007
try this:
/* --- Disable Tab Dimming in Inactive Window --- */

/* Targets the overall title bar (including tab area) when the window is inactive */
:root[tabsintitlebar] #titlebar:-moz-window-inactive {
opacity: 1 !important; /* Forces full opacity */
}

/* Targets individual tab content when the window is inactive.
The `fadein` attribute is often used by Firefox for tabs that are visually active. */
.tabbrowser-tab[fadein]:-moz-window-inactive .tab-content {
opacity: 1 !important; /* Ensures the content of individual tabs remains bright */
}

/* Optional: If the entire browser window seems to dim, this targets the main HTML element.
This can sometimes catch broader dimming effects. */
html[in-active-window] body {
opacity: 1 !important; /* Prevents the whole browser body from dimming */
}

/* --- Menu Bar (Additional CSS to consider) --- */

/* If the menu bar (e.g., File, Edit, View) also dims, these might help.
Note: The exact selectors for the menu bar can be tricky and browser-version dependent. */

/* This targets the menubar itself if it's considered part of the main window's dimming. */
#main-window:-moz-window-inactive #menubar {
opacity: 1 !important;
}

/* Or more generally, if elements within the menubar dim: */
#menubar:-moz-window-inactive {
opacity: 1 !important;
}


If it's not what you want, just specify more and I'll improve it.

>>105587043
it sadly doesn't do anything.
i was using this prior, but it only undimmed the current tab:
```
toolbar-menubar:-moz-window-inactive, #TabsToolbar:-moz-window-inactive {
opacity: 1 !important;
}
```

>>105587100
I just picked the css manually and could find something (picrel is the result).
Try this:
/* Make the background tabs more visible: */
.tabbrowser-tab:not([selected="true"]) .tab-background {
background-color: rgba(207, 207, 216, 0.2);
/* border: solid 1px rgba(207, 207, 216, 0.2); optionally customize the border */
}


If you want to also change the border-color for inactive tabs, just uncomment the border line.
I'm assuming you already have the userChrome.css in the correct folder and toolkit.legacyUserProfileCustomizations.stylesheets enabled.

>>105587100
>>105587202
You can customize the color. The color I chose was the same as the browser already uses when mousing over the tabs.

>>105587202
thanks for the effort, but it's still dimming when firefox loses focus. i'm on fedora 42 kde wayland, if it makes any difference. i have uncommented the border line in the screenshot.
>I'm assuming you already have the userChrome.css in the correct folder and toolkit.legacyUserProfileCustomizations.stylesheets enabled.
that is correct.

>>105587255
For white theme, try using this instead:
background-color: rgba(207, 207, 216, 0.3);

or

background-color: rgba(207, 207, 216, 0.4);

Do you have one that stops the "Update your browser" popups when you haven't restarted your browser for more than a week?

>>105578099 (OP)

>>105587264
they're more readable when not focused now, not fully solved but it's good enough. thanks!

>>105587308
You're welcome.
I also made the file menu bar more darker in the css below.
The values can be adjusted, I just made it more darker, picrel is the result, but you can customize the color as you want.
Here's a darker option (as in picrel):

/* Make the background tabs more visible: */
.tabbrowser-tab:not([selected="true"]) .tab-background {
background-color: rgba(160, 160, 160, 0.3);
/* border: solid 1px rgba(207, 207, 216, 0.2); optionally customize the border */
}

/* Make the menu bar more visible */
#main-menubar > menu {
background-color: rgba(192, 192, 192, 0.4);
border-right: solid 1px rgb(160, 160, 160);
border-bottom: solid 1px rgb(160, 160, 160);
}

>>105578099 (OP)
>extensions.screenshots.disabled
are you serious? this is one of the better features they came out with

>>105587386
I don't like the clutter it adds to my context menu. I just hit the Print Screen button instead.

>>105587386
It defeats most of the DRM videos, too.
Videos that go black when you try take a screenshot? You can screenshot them with Firefox's built in screenshot tool (don't report this as a bug).

>>105587355
thank you!

>>105582793
>breaks youtube playlists

>>105587355
instead of using border you could make it the margin to give each menu item a nice 1px spacing.

>>105589216
You can click the button left of the url bar and allow permissions to make playlists work. Then just disable them again once you're done. I don't know if there's a more convenient way to do it for playlists, I don't use them a lot.

>>105589421
Although, from what I can tell, you don't even have to block permissions again, autoplay stays disabled for everything except playlists. I'll need to test it out a bit.

>>105589428
Okay, not quite, regular videos autoplay. But channel trailers don't. YouTube is weird.

>>105578099 (OP)
A genuinely useful thread for once. Thank you OP, settings applied.

>>105591406
Settings redeemed, best Sirs!

Is there any way to define a default window size and position that isn't limited to your screen?
Firefox forces a margin around the window, and won't sit up against the left side of the screen without using something like Sizer. And even that doesn't persist between sessions.
Chromium allows it just fine, and is one of the reasons I'm still using it

>>105578099 (OP)
>- Remove "Inspect accessibility Properties" (context menu):
Why?

Anyone have a screenshot to compare the diffrences between the tweaks mentioned by >>105578674 and a default setting?

>>105578099 (OP)
nigger, just use firefox ESR.

>>105578099 (OP)
restore backspace going back a page:
browser.backspace_action to 0, default is 2 (1 scrolls up a page, shift+backspace scrolls down). 2 just makes it do nothing

disable smooth scrolling
general.smoothScroll
unfortunately, some sites have their own smooth scrolling so this setting may not affect them.

full-screen-api.transition-duration.enter to 0 0
full-screen-api.transition-duration.leave to 0 0
disables the fade in and fade out effects when entering or exiting full screen for videos etc.

>>105587397
> I just hit the Print Screen button instead.
That doesn't capture full web pages.

>>105578099 (OP)
I'm surprised none of you have mentioned browser.tabs.insertAfterCurrent and browser.tabs.insertAfterCurrentExceptPinned to insert new tabs after the current one instead of at the end (which sucks)

Thanks, OP.

>>105587386
it would have been better if it let you select the dimensions you want to screenshot, or automatically stitched images together when you go over the limit
instead, on long pages it just shits itself and offers to screenshot from the top of the page to some arbitrary limit point and no further

>>105592256
Unless you are a web developer working on accessibility options, why would you keep that option enabled, cluttering your context menu?>>105595334
I know. I use the console or the developer tools screenshot button for that. You don't need to tell me how to use a computer, bro.

>>105578099 (OP)
good post, bumping

>>105594800
Here. I wasn't first sure if it was just because I was on Winhoes 10 but after updating to W11 LTSC it still had the same issue.
You see the right side is weirdly blurry as if it was bit out of focus or something.
Left side is fine.

>>105598710
Windows 7 had the best font rendering of all time, but they had to ruin it for the sake of aesthetics.

>>105600017
Windows 7 mangles fonts to fit to a pixel grid.

>>105600884
>mangles fonts to fit to a pixel grid.
That's a weird way to describe proper, sharp rendering as opposed to the blurry mess that is macOS and newer Windows.

>>105601688
pixelated fonts look awful. "Blurry" actually just means pleasant to look at

>>105578720
It's Chrome without Google's retarded bullshit and data collection. Also it's not literally Chrome, it's Chromium, at least learn the difference.

>>105601706
It's not pixellation, it's hinting. Huge difference.
>pleasant to look at
Sharp fonts with strong hinting are much better for long reading sessions (multiple hours). That's what I meant by "ruining it for the sake of aesthetics". They had a good thing going with Windows 7 and then started sacrificing functionality for aesthetics to casual computer users and retards. It's been form over function ever since, the blurry fonts are just one example of that but an important one.

>>105601745
Smooth lines are generally far better than sharpness. Firefox's rendering_mode 5 looks great if you turn on enhanced_contrast (to reduce the blur) anyway

>>105595883
Thanks. The way Firefox does it by default is very weird. It tries to add related tabs right after and unrelated tabs at the end, I think? But it can't properly tell which is which and ends up feeling random and annoying. Even if it got it down right, it's still probably the wrong approach to new tabs.

>>105601818
Similar problem with the browser cache. It keeps fucking up my threadwatcher, resetting it to a state from days ago, and I have to restart >:(

>>105601688
Do you also think mutilating your cock will make things "proper"?

>>105601909
What a strange response. Do you think about tranny cock all day and night? I don't, I just want my computer to be optimized for functionality over looks because I'm not a woman or retarded.

>>105578099 (OP)
>browser.uidensity to 1
Holy shit, it looks so much better without the stupid empty space padding! Thank you anon!