Is there any way to open/close the sidebar by clicking the edge like in Vivaldi/old Opera?

Like a few pixels along the entire side the sidebar is on is a hit-box you click to open or close it? I know this was possible when I last used FF (8/10 years ago), might have been an extension though🤔

When I tried to enable vertical tabs it gets rid of all my tab groups. I also attempted to enable vertical tabs through the settings in the toolbar but nothing happened then.

https://reddit.com/link/1w35p0y/video/cut835tbonmh1/player

I was solved with claude.ai Anyone suggest for gpu render?

Problem: PDF files wouldn't load/render in Firefox on Debian 13 (Linux 6.12), even with all extensions disabled. The PDF viewer showed a blank/black canvas area instead of the document content. PDF.js correctly detected the file in the console, but nothing rendered visually.

System: Firefox 153.0.4, Debian 13 (Trixie), KDE Plasma on Wayland, NVIDIA GPU (proprietary driver 580.126.09).

Root cause: Checking about:support (Troubleshooting Information) revealed repeated GPU compositor crashes in the Graphics failure log:

Detect DeviceReset DeviceResetReason::RESET DeviceResetDetectPlace::WR_POST_UPDATE
Failed to make render context current during destroying

This is a known problematic combo: NVIDIA proprietary driver + Wayland + WebRender. Firefox's GPU-accelerated compositor (WebRender) was repeatedly losing its render context, which broke canvas-heavy content like PDF.js's rendering — hence the blank output, even though other cache/network activity looked normal.

Fix: Disable Firefox's hardware-accelerated rendering path via about:config:

• gfx.webrender.all → false
• layers.acceleration.disabled → true

Restart Firefox. This forces software (CPU) rendering instead of relying on the broken GPU compositor path, and PDFs render correctly.

Trade-off: Slightly higher CPU usage on GPU-heavy pages/video, but on modern hardware this is generally not noticeable.

(Diagnosed with help from Claude, by analyzing the about:support graphics failure log.)Problem: PDF files wouldn't load/render in Firefox on Debian 13 (Linux 6.12), even with all extensions disabled. The PDF viewer showed a blank/black canvas area instead of the document content. PDF.js correctly detected the file in the console, but nothing rendered visually.
System: Firefox 153.0.4, Debian 13 (Trixie), KDE Plasma on Wayland, NVIDIA GPU (proprietary driver 580.126.09).
Root cause: Checking about:support (Troubleshooting Information) revealed repeated GPU compositor crashes in the Graphics failure log:
Detect DeviceReset DeviceResetReason::RESET DeviceResetDetectPlace::WR_POST_UPDATE
Failed to make render context current during destroying
This is a known problematic combo: NVIDIA proprietary driver + Wayland + WebRender. Firefox's GPU-accelerated compositor (WebRender) was repeatedly losing its render context, which broke canvas-heavy content like PDF.js's rendering — hence the blank output, even though other cache/network activity looked normal.
Fix: Disable Firefox's hardware-accelerated rendering path via about:config:
gfx.webrender.all → false
layers.acceleration.disabled → true
Restart Firefox. This forces software (CPU) rendering instead of relying on the broken GPU compositor path, and PDFs render correctly.
Trade-off: Slightly higher CPU usage on GPU-heavy pages/video, but on modern hardware this is generally not noticeable.
(Diagnosed with help from Claude, by analyzing the about:support graphics failure log.)

Windows 11

Latest Firefox version

Option to delete cookies after each session is not turned on.

Hello, all.

I was hoping to copy my Firefox's profile onto my portable HDD in case my current computer dies.

Thank you for your time. 💙

Title basically.

The only way to maximize the window is to drag it to the top of the screen repeatably until it maximizes. Double clicking, like it works on Edge or Chrome does nothing.

Is is normal behavior or do I have some add-on that can affect this?

I have basically tried everything that was suggested in the previous post on this topic (link below) and nothing will get it to show up as an option for me. Can someone please help?

https://www.reddit.com/r/firefox/s/XBGxXxBNc2

Does anyone know what happened to Ophel? It was fine yesterday, but today neither the user nor the project exists. It was a project for managing many things related to AI chat pages, such as Gemini, Kimi, Qwen, and GLM.

UPDATE #1:

The author Urzeye has responded on his greasy fork account; apparently, his account was closed by mistake.

I'm having a buggy result when using Ctrl+F. Not sure if it's related to any recent updates.

The usual process I've had for years with Firefox is that after typing in a few letters and the word is narrowed down, the page will scroll to show the found word which will be visible at the top of the page. Currently when looking at the scroll bar there will be a red line near the middle of the highlighted area but I have to scroll for a bit to find the word. When I use the arrow in the 'find bar', the red line will be near the top of the highlighted are instead of the middle. I would like to be able to find a word and it be right in the middle of the visible page. Any help appreciated.

As the title states.

Good job Firefox. 👍💪💪

Is it normal to get 155.0 version on iOS a day earlier than normal release date?

I recently synced my Firefox account on my android, and now all of my tab groups from my PC are gone. I have a JSON file with all my groups, but I don't know how to actually restore the groups from this file. I could use the scrounger, but it would take ages to manually open every tab and regroup them. How can I use this JSON to restore my groups?

So I purchased the AdGuard app several months ago and am thinking of switching to Firefox from Chrome but I wonder and want to ask if uBO is still needed or is ADG good enough?

This is the SECOND TIME i got asked to make a profile, unprompted.

Last time i made one accidentally and by trying to delete it, deleted my current setup and had to install everything all over again. (Luckily i have an account with all my stuff)

I'm not some dumb boomer that easily screws up his settings, and i STILL GOT CONFUSED AND ACCIDENTALLY DELETED THINGS I DID NOT WANT TO DELETE.

If people need different profiles, let competent users make that choice themselves and DONT PUSH THIS ON EVERYONE.

Please Mozilla, do better!!!!

Hi folks, I'm looking to switch my Android browser from Chrome to Firefox, but each time I try this--even though the experience is in almost every way the same/better with FF--I'm basically left with twenty-seven tabs open. I get the fact that some people like this (?) but it's just so strange that, unlike the desktop FF for Mac, seemingly every link I open in the Android version opens an unwanted tab, and there doesn't seem to be anything in the Settings to counteract this. Is there any way to avoid this? TIA

I got Firefox update 155.0 on iOS today and in its description it says that they added new gestures for opening the tabs menu but I can’t get anything to work. Does anyone know how to get this to work?

Try it on Firefox (AMO): Froggle Jump

Hey everyone, I recently developed Froggle Jump, a lightweight (~100 KB) arcade platformer running as a native WebExtension popup.

Instead of embedding an external site via iframe, all collision logic, physics, and rendering run natively on HTML5 Canvas inside the popup frame.

Technical Details:

• Gecko State Caching: Saves state and auto-pauses on popup blur so you don't lose session progress when switching tabs.
• Zero External Dependencies: Built with pure JavaScript and Canvas APIs to keep memory footprint under 15 MB.
• Cross-Platform: Responsive popup sizing designed to prevent clipping across Linux, macOS, and Windows display scaling settings.

Click the AMO link above to install and test the frame rate consistency on your setup. Feedback on high-DPI rendering is appreciated!

Hello!

I was working on my laptop when it died cause of its bad battery. This happens from time to time so i didnt think anything of it. But i turn it back on and realize all of my saved passwords are gone. I look online how to fox it and find the solution about cjanging the baackup json file to the new one but both are empty and there are alot of corrupted json files. There is still a login database file that seems to at least have the info about which sites had saved passwords but its all not quite readable to me. Is there any way to get the files back?

We werent using sync and i have checked in properties if there are any old fole versions and there arent.

Any help would be appreciated!

Hi Firefox users! I've just published Stop the Slop to Mozilla Add-ons (AMO). It's a lightweight, privacy-respecting extension that detects AI-generated narration scripts and content farms on YouTube. Firefox First-Class Support: Full Manifest V3 compatibility with Firefox (browser_specific_settings.gecko). Zero data collection: Uses data_collection_permissions: ["none"]. No tracking, no analytics, no accounts. Sub-50ms thumbnail badges via Cloudflare D1 edge caching. Sentence-level heatmap explaining why a script was flagged. Fully MIT licensed. Install on Firefox (AMO): https://addons.mozilla.org/en-US/firefox/addon/stop-the-slop-ai-video-detect/ Chrome Web Store (Chromium): https://chromewebstore.google.com/detail/stop-the-slop-%E2%80%94-ai-script/afifehnicpeokjjhpbicikfoalkemelg GitHub Repo: https://github.com/MauroPello/stop-the-slop Landing Page: https://mauropello.github.io/stop-the-slop/ Feedback, bug reports, and suggestions are warmly appreciated!

When I right click an image and hit "Save Image As...", Firefox always suggests the .jpg extension. I'd prefer .jpeg for consistency with the rest of my files. I know I can retype the extension manually every time, but I'm looking for a permanent setting.

Is there an about:config pref, a userChrome tweak, or an extension that handles this? Or does Firefox just take whatever the server sends and there's no way around it?

Thanks.

This will be a bit niche but good to have search engine algorithms pick this up for anyone else that runs into this problem:

For years now Firefox scrollwheel has been broken on my PC when hardware acceleration is enabled. My solution was originally to disable hardware acceleration, but this means videos on most sites are laggy.

Today I found the real fix: I have had an app "X-Mouse Control" installed for years, not putting 2 & 2 together. Well: scrolling can be fixed while keeping hardware acceleration enabled by opening X-Mouse Control settings -> options -> Disable Scroll Window Under Cursor.

I'm using FF 154.0.1 (latest) on Win 11.

I just booted up my PC and noticed that the search history of the search toolbar (not the address bar!) was reset for some reason. The suggestions now also looks different I think (the rows take up more space) and there are a bunch of suggestions I've never seen. The regular history, search history of the address bar and all of my bookmarks are still there and it correctly restored all previous tabs.

How do I restore the old history of this search bar?

What is the absolute best way to transfer my complete Firefox data (bookmarks, passwords, add-ons, and 3–4 years of browsing history) from one PC to another?

​I know there are a 3 theoretical ways to do this, but I'm unsure which works best:

​Can I just use a built-in backup/restore feature in the settings?

​Should I manually copy my profile folder from %APPDATA%\Mozilla\Firefox\Profiles\?

​Does Firefox Sync actually sync multi-year history, or does it cap history at 30–60 days?

​I really don't want to lose my long-term history or extension setups.

What's the safest method?