Firefox Community Forum

Hi! I'm on a relatively new to me (refurb) desktop computer running Win 10 Pro (64 bit)* and Firefox 143.0.3.

In the past week both Firefox and Win 10 have updated. I don't know what happened, but now when I boot up or reboot, my computer opens to MS Edge. Yuck!

Every single time I have to reinstall Firefox! Once I do that, all is well again. I have all my bookmarks back, etc.

It also keeps changing my "default to Firefox" browser setting, turning it OFF, while I'm using Firefox. I repeatedly have to keep going in and clicking to make FF to the default browser again.

Why is it doing this? How do I stop it?

Anyway, I know I can't delete Edge or uninstall it. How do I shove it back into the black hole it has lived in until now?

Thanks very much in advance for any help offered. :)

KathyOnOBX

• (Nope - computer not eligible to upgrade to Win 11. My processor isn't fast enough, I think.)

Environment - Device: Acer Neo 16 (PHN16-71), 2023 model - OS: Windows 11 23H2 (Build 22631.4974) - Browser: Firefox ESR 128.7.0esr (similar issue observed on 140esr) - Current version in use: Firefox ESR 143.0.4 (64-bit) - Graphics: Hybrid – Intel UMA + NVIDIA RTX 4060 - Drivers:

 - Intel UMA: 31.0.101.4146 (UMA-labeled)  
 - NVIDIA: 551.76 (GeForce Game Ready Driver)

Issue Description While using Firefox ESR (128.7.0esr and 140esr), the laptop’s built-in screen occasionally begins to flicker, and after prolonged usage—especially when browsing Facebook for tens of minutes—it gradually develops severe distortion, resembling water damage or ripple effects.

Key observations: - Screenshots appear completely normal, indicating the framebuffer is unaffected. - No external monitor has been tested yet; the issue is only observed on the built-in panel. - Rebooting temporarily resolves the issue, but it recurs unpredictably. - This issue never occurred on my older laptop (Acer V3-772G) using the same ESR versions.

Steps to Reproduce 1. Launch Firefox ESR (128.7.0esr or 140esr) 2. Browse Facebook continuously for tens of minutes 3. Screen begins to flicker, then gradually distorts 4. Take a screenshot → image is normal 5. Reboot → screen returns to normal

✅ Expected Behavior The screen should remain visually stable during browser usage, without flickering or distortion.

Actual Behavior The built-in screen flickers and eventually distorts, while screenshots remain unaffected. This suggests the issue may lie in the final stage of the display output pipeline, possibly involving the TCON (Timing Controller) reacting to GPU output or Firefox’s rendering behavior.

Additional Notes  

- Hardware acceleration was disabled in Firefox for testing — the issue still occurred (on older versions). - No similar behavior observed in Chrome or Edge. - BIOS screen appears normal, ruling out panel damage. - After upgrading to Firefox ESR 143.0.4 (64-bit), the distortion issue has not reappeared for two weeks, though minor flickering still occurs occasionally during browsing. - Interestingly, when distortion or flickering occurs while browsing Facebook, switching to another website immediately causes the screen to temporarily return to normal.

 This suggests the issue may be triggered by specific rendering patterns or GPU calls on certain web pages.

- This may indicate a rare interaction between Firefox ESR and specific hardware configurations (UMA → TCON → panel).

I've used Slack every day for the past decade, and Firefox has been my primary browser for some time now. I've never had an issue with the two, but now, Firefox is reliably crashing every time I attempt to open Slack.

I've tried clearing my cache both broadly and specific to Slack, with neither producing results. Even tried deleting all cookies on Firefox, which was a bit of a pain, and it was no help.

I did read up on some people encountering a similar issue that could be fixed by deleting the Slack entry in "about:serviceworkers," but this did not help here.

The only extension I'm running is uBlock Origin, which I've been running for probably as long as I've been using Firefox, and that has never presented an issue before either.

Would appreciate any help or advice on the matter.

hi in a new win 10 instal most text incl Fire Fox text is made up of letters [font] that are made of thin and thick lines [in the same letter]

i dont know if its a strange font or another problem, i have copied all "font" setting from my other pc where i dont have the problem.

also i cant get spell check to work here dsespite turning it on

its very distracting, would be very gratefull for any suggestones if any one can 

help thanks

Windows 10, latest version.

I hit a shortcut, I think, and heard the trackpad, then one of the three open tabs was isolated from the rest in a separate, almost chromeless window.

It's not in the taskbar pop-ups but instead has its own icon. In this 'chromeless' window there is no option to add a tab or window, there is no area to move it (I have to carefully use emtpy space in between buttons to move it). The top just fell off, that's basically it.

I have never seen this and have been using Firefox from the start way back when. I didn't install anything; this just happened as I was reading something and accidentally touched a key. Nothing changed, no settings were adjusted, nothing.

This option is not in the tabs menu or anywhere. I must say I kinda like it for this one 'tab' (which is a solo chromeless window) but I do need the menu and so on for productivity.

One of the screenshots shows this 'window', the other shows that 'window' is not part of the regular pop-up tabs in the taskbar but rather has its own icon, as if it were an app, in that taskbar.

What in the world is this? Can someone help?

my firefox/mozilla updated without my knowledge. I turned the computer off and on and when it came back on it said it updated. My bookmark bar is missing along with all the drop down bookmarks I had..there was an arrow pointing down. I don't remember all of the bookmarks there were and there were lots. Some were for doctor portals. How can I get my bookmarks back I tried some online stuff but nothing works. Donna

I have no idea how 100k people can review an extension labeled ICLOUD PW EXTENSION and you guys can't either remove it for the scam it is or show it has your approval as an extension up to FireFox security standards. 2.7 stars 100k reviews looks like a scam. Simply my feedback. Can't tell if I should trust so I'll never trust it until it's sufficient enough.

PROBLEM: Pinned tabs are useful, but if I have more than one Firefox window open and I close them in the wrong order, the next time I open Firefox, my pinned tabs are gone and I have to pin them again.

SOLUTION: Pinned tabs should be able to be permanent so that they will re-open no matter which Firefox window is closed first. Is there a way to make this work?

I have various shortcuts saved on the shortcut page comes up after logging in. Its set to 2 rows.. I use it every day. Used it this morning and working perfectly. Been out and when I came back the page is totally blank. I've tried sytem restore to 5th October but makes no difference. I use Windows 10 and read that Firefox are continuing to support Windows 10 I'm visually impaired and use a desktop PC with a large screen. I'm not PC techically knowledgeable. How do I restore my shortcuts or how do I re create them?

Neither the [`

So how do I get them running? A significant portion of the internet runs on WebM and the fact that Mozilla's own dev docs can't show examples is a good indication of a problem.

This started happening a few days ago.

I tried to drag a tab out of the main window to put it in its own window on my other monitor, but the tab just became unselectable, and if i scrolled in the tab bar, the tab icon and text would remain locked in place in the display while the other tabs moved behind it.

The main Firefox window also lost the minimize, restore, and close buttons. The only way to make the tabs work was to close Firefox and relaunch it.

I noticed this happened only after any app in the OS went full screen, be it a steam game, or another Firefox window, or a VLC window, or anything else that I did that made an app full screen in any of my monitors.

I am using Ubuntu 24.04 with KDE Plasma 5.27.12. Kernel is 6.14.0-29. Display server is Wayland.

Initially I thought this could be a problem with the snap version of Firefox, so now I've installed the deb package, but the problem remains. Firefox is the only app which presents a problem of any kind when any window goes full screen.

Here's a video showing what the problem looks like, in case my description was not clear. The ghostly tab in this video is the chess.com home page and you can see it as the third tab from the top right of the video, and it remains in that position as i scroll the other tabs, completely unselectable with the mouse.

https://www.youtube.com/watch?v=-mAfPS3_qkg

Any idea of what could be causing this issue to appear?

Thank you!

Firefox repeatedly crashes on my, multiple times a day. I'dc really like to NOT have to change my default browser to Chrome.

What happens is that Firefox freezes, and I get a white bar at the top telling me so. I get a popup box asking if I want to close Firefox or wait for it to respond. Waiting doesn't work, so I always have to close Firefox. When I reopen it, fortunately all m,y open tabs are retained, but it crashes again within minutes or seconds as soon as I click on anything.

There only thing that seems to work is a reboot of my PC. But the respite is short before Firefox crashes again.

I've disabled most plugins, but that hasn't helped. Is there a way to create an event log within Firefox that I can share with someone at Mozilla to help e debug the issue? It's got to be something local rather than Firefox itself; I can't imagine this is happening to most users.

Each day I get an email from Microsoft OneDrive with photos of the day, titled On this day"'. Clicking on a button titled "View all memories" on the email causes the photos from that day to appear as a new tab on Firefox. Perfect. Until a couple of weeks ago.

At that time, clicking on it caused the new tab to appear but no photos are displayed. The screen looks as if it's trying to load the pics, but nothing shows up. When I open up the OneDrive website directly, I can click on "Photos" and see ALL photos in my cloud account, and there is also a row at the top under the title "For You" which shows several clickable buttons titled "September <XXX>", "A new trip", "Revisiting <month XXX>", "Last week", etc. Clicking on each of those separately yields the same result as when I clicked on "View all memories" from the original email, which is that nothing is displayed but it appears to be trying.

Below the "For You" row is "All Photos" sections which has everything, but not organized like the "For You" row. It simply is the entire set of my pictures from which the "For You" buttons do their selection from.

I exchanged emails with the MS OneDrive support over several days, who made numerous suggestions, but none worked. We did determine, though, that the photos do appear seamlessly if I switch to Edge as the default browser, but I want Firefox as my default.

Because the photos did appear under a different browser, they suggested I contact Firefox, which I'm doing. And this is after I've tried all the suggestions contained in a google search I entered as: "firefox setting to allow microsoft onedrive photos of the day".

Understandably, I'm very frustrated and appreciate any suggestions anyone can provide. Thank you.

Firefox freezes when I try to sign into YouTube via Google. Becomes totally unresponsive and I have to close browser. It's the only site this happens on. I have cleared the cache and cookies, unchecked "Hardware Acceleration" and other recommendations from other posts. Please talk to me like I'm your Baby Boomer dad.

Hi, I'm having difficulty getting tabs to open as I prefer.

I have browser.tabs.insertAfterCurrent set to true.

When I right click on a link and select Open Link in New Tab, it does open the new tab next to the current one. However, if I then repeat to open another new tab, this appears to the right of the first one, rather than right next to the current tab.

So, if I open a series of tabs, they appear 1 2 3 4 5 next to current. I would like them to appear 5 4 3 2 1.

Is there another setting that is interfering? I wondered if the tab groups settings are making a difference?

Many thanks!