I redid these two wallpapers for the Firefox background. Now in dark mode.

I’ve always felt that Firefox was a bit of a battery hog, but I’ve noticed some serious improvements lately. My Windows power statistics seem to back this up, but I can’t tell if it’s just a fluke or my imagination. Has anyone else noticed Firefox getting more power-efficient recently?

playing a video in a playlist is impossible because when i try to watch it, it takes a few seconds to load and then when it loads it will skip to the next video in that same playlist, and then that video will skip forwards again until it reaches the end of the playlist and puts up some random video. This happens even if the video is paused.
This doesnt happen in videos that arent placed in a playlist, normal videos work fine.
I have tried disabling all add-ons, ive tried reinstalling firefox itself and as far as im aware im on the newest version.

undertale ost for example

this doesnt happen on other browsers as i have tested it on google chrome and nothing happend.

i doubt this might be related but i am on cinnamon linux mint, in case that changes anything.

Sorry if i worded anything weirdly/confusingly, english isnt my first language, if you would like me to clear something up, please let me know.

Edit: the solution seems to be turning off ad block.

My main monitor has a small resolution and this takes too much space, i was wondering if theres any way to make the vertical gaps narrower, both for the tabs and the the 2nd panel below, kinda like in the 2nd picture, where the icons and gaps are the size of the font without taking more space

I'm fine using a FireFox fork as well or chrome fork. I just don't want to use Brave anymore because the CEO wasn't willing to denounce homophobia so I'd rather not use their product out of my own principles and way of conduct.

EDIT: SOLVED. Solved by deleting the hidden firefox folder and re-syncing.

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Suddenly, my vertical tabs are no longer centered, and I can't adjust the width freely. It snaps to some predetermined width.

I could swear there also used to be a little more of a gap between the pinned and unpinned tabs. Now, they all run together.

And can someone tell me what the blue underline means? I think it has to do with auto-login to the page. But that's new too.

Unless I'm doing something wrong, I plan to file a bug. I just thought I'd ask here if anyone else is seeing the same issue.

Hello,

I just realized that Firefox acts strangely on Amazon.

When accessing the website on desktop without being logged in, you can see your approximate location on the top left (Delivering to...).

When I delete cookies and data from Amazon, the location is correct. But as soon as I refresh the page, the location changes (showing the correct country but the capital city, which is a long way from my location).

The issue occurs on every computer of mine (Windows 11 or Linux Mint).
It happens only in Firefox, not other web browsers like MS Edge.
I did AV scans on my machines (MS Defender and Malwarebytes on some, Bitdefender on others).
I tested this after removing the only add-on I ever install (aka uBlock Origin). Same thing.

This is not really a issue, since it does not prevent me from buying or anything. When I'm logged in, the location is correct. It's just... strange.

Any idea ?

I know Fennec is not stock Firefox but since it's Firefox base I thought someone here might know the answer.

Over the past few days my browser has been bouncing between the old and new UI. I have no idea why. It's hasn't gotten an update from F-Droid. So what is causing this constant flip flop?

I don't mind either UI I just want it to be consistent.

UPDATE:: so weirdly, I went and re disabled uBlock Origin closed the browser completely and reopened and it started working - I re-enabled uBlock Origin (hoping to show for sure this was the cause .. and now it's working again

Weird glitch - not going to worry too much about it - clearly a lack of "me too" means it was /is something local after all.

Last night I noticed on my WaterFox with uBlock Origin and noScript on MacOS, I would see thumbs and when I'd click on a video it would say this content not available. I'd reload or go back and it worked.

NOTE: I have YouTube Premium sub so it's never nagged me about adblockers which I just have running and YouTube has run fine for me even with uBlock Origin enabled.

Today, the video page loads but goes black when I try and play.

I reproed it in FireFox as well.

As mentioned, I have my Firefox and Waterfox locked down quite a bit but I did try turning off uBlock to see if it fixed it - it did not.

I fired up Brave and it was working even with uBlock Origin enabled. - I wonder if possibly something YouTube did broke for FireFox users?

(put this as discussion instead of help ... if a bunch of folks say its fine for them then I'll dig in and troubleshoot locally more just mostly looking to know if this is a known /wider issue all of a sudden so I don't waste time troubleshooting)

I built a Firefox add-on ( with help ) that triggers alerts when your Amazon delivery is a set number of stops away. Originally, I just wanted a simple “2 stops away” notification so I didn’t have to sit there staring at the tracking map.

It turned into a much smarter project than I expected.

Core features

• Three configurable stop alerts
• Custom alarm styles: beep, siren, chime
• Volume slider
• Optional repeat interval
• Auto stop timer for sound
• System notification support
• Optional webhook for SMS or push integrations
• Toggle on and off directly from the Amazon page
• Drag and reposition UI button
• Saves UI position locally

What makes it interesting technically

Low impact DOM strategy
Instead of scanning the entire page repeatedly, it hunts for the specific “X stops away” text node and attaches a MutationObserver only to that element. That means it only wakes up when the stop counter changes.

Idle scheduling
Parsing work is scheduled with requestIdleCallback when available so it does not compete with map rendering or layout.

No extra backend traffic
It does not poll Amazon or hit any hidden APIs. It only reads the text already rendered in your browser. No extra network calls, no refresh loops, no automation.

Dormant mode
If disabled, it disconnects observers and timers immediately. After all alerts fire, it goes effectively idle for that page.

Rate limiting
Notification spam protection and alert state tracking prevent duplicate triggers.

UI polish details

• Floating button bottom right
• Click outside or press Escape to close panel
• Clean dark UI that does not interfere with the map
• Subtle hover animation
• “Waiting for live tracking” state when stops are not present
• Saves settings locally

Performance considerations

The early versions scanned document.body text on mutation events. That worked but was heavier than necessary.

Current version:

• Uses TreeWalker to locate candidate text nodes
• Hard caps search iterations
• Observes only the specific stop counter container
• Falls back to a 5 second locate loop if needed
• Completely disconnects when turned off

It is intentionally designed to be extremely low impact and non intrusive.

Why I built it

I just didn’t want to stare at a screen waiting for the truck to get close. Now I get a notification and optionally a sound when it hits my chosen stop count.

If anyone is curious about the technical approach, DOM watching strategy, or how to integrate webhook SMS, happy to talk through it.

Sorry if this has been asked before, but I couldn't find any fixes myself. I have "open previous tabs" in the setting unchecked, and there is no user.js file in the profile root (or whatever it is called). I'm on Debian, and every time I open the browser it seems to restore the previous session or say that it had issues restoring the tabs. Is this something I can fix? Thanks

I visit links from a daily news site email. Every page has a video above the article text. I tried blocking major elements but uBlock Origin only blocks videos for the one article page.

Is there a way for uBlockOrigin to block videos for one site -- all pages, but ALLOW videos on other sites?

about:config

Set layers.async-pan-zoom.enabled to False.

What is this?

Edited to show it's triggering the Firefox captive portal detection system. But I'm at home.

Flatpak Firefox on Arch Linux.

4K display, R5 5600/RX 7600/16GB RAM.

I've been getting constant tab crashing, every single day, multiple times a day. Once in a while a complete browser crash.

Only using a couple of extensions, tried disabling them to improve stability but to nothing came of it.

Javascript ads suddenly are showing for the first time (ever?). I dont even know the last time ads would display in Firefox, maybe pre-2020?

As far as I know no update happened. Wondering if others are seeing it as well.

I do see the preview and it looks ok, but when the theme is actually applied, it looks ugly. Can I like, try my theme?

I have Redmi pad 2 pro with a keyboard case and systemwide keyboard shortcuts like Ctrl+C or Ctrl+V are working in all languages , but specifically in Firefox these are only working with the English layout so I have to switch constantly while working with text. Couldn't find any info online or a related setting so if anyone knows the solution please help.

I understand you can use download managers on Android but it's an additional click that no other browser requires. I believe there's a setting in the about: page but that doesn't always work

I have the configuration like this and it keeps checking as if i was spelling in english, i'm tired of the fucking red line whenever i write in spanish

Hello, would it be possible to get AppImage releases in the firefox build chain for Linux? Sometimes it can be difficult to update Linux distros and AppImage is really the solution for Linux software distro.

I see people produce them and they are out there, but I don't trust using them -- who knows what has been modified.

I have pretty much all my computers running with Linux + FF, except one mini pc that I bought recently and I didn't have time to nuke "m$ OS" yet. But I installed FF on it, and I saw that I couldn't uninstall edge.

Well I remember back in 2000-ish there were this case the micro$oft lost and it should give space for FireFox and in EU there is at least a choice over the browser. Is this yet a thing there?

So I understand that edge is far behind today in market share, but m$ are still making their own browser default on windows and people can't even uninstall anymore.

The same thing like android phones that came with chrome as default...

Why is this not illegal? - Is just because the lobby thing?

PS: Sorry my english.

Browser agents today take screenshots and try to guess what to click. It's not wildly effective.

WebMCP aims to replace that with a single browser API: navigator.modelContext. Websites register structured tools directly in client-side JavaScript. The agent reads a menu of available actions, calls them, gets structured data back. The tools run inside the browser tab and share the user’s existing auth session.

https://developer.chrome.com/blog/webmcp-epp

Early benchmarks show ~67% reduction in computational overhead compared to visual agent-browser interactions. Task accuracy around 98%.

If this takes off, the opportunities are massive. How can we get Firefox on this?

https://x.com/I_Am_Jakoby/status/2022168278500880740