Firefox Community Forum

Went into Firefox and got the error message: Platform version 131.03 is not compatible with min version>=131.02 & max version>=131.02 So I'm thinking that the last update caused the error. I did a system restore to a week earlier, and after 5 hours, the computer rebooted to that date. Upon opening Firefox, I found the the notice that the next time Firefox opens, it will update. After closing, and reopening, Firefox updated and displayed the same error message. Nor quite sure what to do, I downloaded Firefox again, and was going to uninstall and reinstall. But as soon as the download finished, it loaded. So now I have the new Firefox without all of my saved bookmarks and passwords. I thought I'd read someplace that that wouldn't happen, and all of my password and bookmark history would transfer to the new Firefox. As if that wasn't enough to ruin my day, I found that the new Firefox isn't working in my wife's account on the same computer. She gets the same error message as I did before the new install. I know, my fault for not backing up the bookmark and password files, but what's my option now?

Since recently 1~2 version, my Firefox keeps consume large amount of memory and release it repeatedly

Even I restart Firefox and do nothing, it will start doing this again

I use about:processes and about:memory to capture this seems the main process's "tab.query" causing this, please check

PS: sometime it will consume till system max (64GB) and cause my OS out of memory. PS2: that wave-like memory usage is cause by Firefox

I've been having an issue with picture-in-picture (PiP) mode where the subtitles and rewind/fast-forward buttons (rr/ff) won't follow the video into the small player for Disney+ specifically. I have no issues with YouTube or any other site. The subtitles and rr/ff just stay with the original video player on the site while the video is in PiP mode. I can see the subtitle button on the PiP player, but it is grayed out and I can't click it. I've updated both Firefox and my computer (Windows 11) and reinstalled Firefox, cleared cookies and cache, and still no dice. Any advice? Thanks!

(In the screenshot, the PiP player isn't showing video, but I think that's just because of Disney's anti-piracy software - I can see the video in the PiP player on my screen.)

Cannot open Analyst links on eTrade website. Looking at a particular stock and clicking on the Analysts link opens another window showing individual analysts and articles relating to their opinions of this stock. I cannot click on either the analyst's name nor the articles associated with their name. eTrade customer service says Firefox is not working well on their site. I tried Microsoft Edge and everything was fine. Is there some feature I should enable on Firefox or is this a shortcoming in Firefox?

I just installed Firefox. What I noticed right away while using it was that fonts were very blurry/hard to read on all web pages, and even in firefox's menus and URL bar.

I attached two pictures, one is a screenshot in Firefox, and the other is a screenshot in Brave. (All chromium web browsers I have tried don't have firefox's font problem)

"The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can caused this problem".

How do I resolve this problem?

I am one of those old-fashioned guys who has a title bar on the main window, and inside this (from top to bottom) a menu bar (File/Edit/View etc), then the current set of tabs, then the address bar.

I can click in the address bar and the caret appears, but the moment I start to type anything to edit the URL the address bar jumps up to to the top of the window, covering up the menus and tabs, with a menu of suggested URLs that at times covers most of the rest of the screen. Some images attached to show what I mean.

This started in a recent-ish release -- it didn't use to do this.

How can I prevent this behaviour, so I can just edit a URL in place the way I used to without the address bar jumping to the top of the window?

Currently using FF 135.0 (64-bit), Windows 11.

I am sorry if this is not the place to ask this question. I am new to web development and have been trying to solve this issue for days. I have an ESP32 acting as an http server. I have developed web pages which have separate html, css, and javascript files. These work as expected when delivered locally (i.e. I double click on the the files), however, when they are served by the ESP the style sheet is ignored and I get the message

The stylesheet (url) was not loaded because its MIME type, “text/html”, is not “text/css”.

from Firefox debugger. The stylesheet is ignore across all browsers (Firefox, Chrome, Opera, Edge), however the error is only shown in Firefox. Normally, of course, I would expect an issue on the ESP32 side, however, the non-Firefox browsers do load the stylesheet (even tough they ignore it) and I am able to verify that the stylesheet is identical to the one served locally.

Oddly, if I open a Firefox tab and load the page, switching to developer mode causes several requests for the stylesheet and the styles are then applied. Subsequent refreshes of the page causes the style to be lost and closing/opening developer mode has no effect.

Although I have disabled javascript to try fix this problem, when javascript is loaded I get a similar message (except the javascript is loaded).

I believe I specified the MIME type because I exactly coped several examples

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8"/> 
    <meta name="viewport" content="width=device-width, initial-scale=1"/>
    <link rel="stylesheet" type="text/css" href="styles.css" />
<!--<link rel="stylesheet" type="text/css" href="name-of-stylesheet.css" />    -->
<!--    <script type="text/javascript" src="ESP-UI.js"></script> -->
    <title>My ESP32</title>
</head>

Thanks for the help!

Wikipedia render Thai fonts correctly. But it seems to render Latin texts and numbers in "TH Charm of AU" font for Thai articles, which I did not set anywhere in the browser (and my operating system). Ticking "Allow pages to choose their own fonts, instead of your selections above" does not fix it either. But it renders fonts correctly in English version of the same article. (See the attached images).

Any ways to fix this?

Thanks in advance.

Although I have successfully logged in many times, I get an error message today: An error occurred during a connection to b2clogin.firstenergycorp.com. PR_CONNECT_RESET_ERROR Error code: PR_CONNECT_RESET_ERROR

Why when you click on the extensions button (jigsaw puzzle icon) in the toolbar to open the extensions panel the “Personalize Your Firefox” screen appears ???

When you right click a gear icon in a particular extension, the drop down menu has no "pin to tool bar" option, it only shows "copy/select all/print..." options ???

Thnak you.

Hello,

I created a 1+-minute video on my YouTube channel and then posted it to my GoogleSite. But Firefox will not allow it to play because it is embedded from another site. Can you kindly help me understand how to get around this?

My goal is to create content on YT that only I can embed on my site. Yet it does not seem that there are options allowing for this. My desire is to share some wondrous FREE visual content AND to protect it by funneling it to my site.

Please know that I am not a techie as you most likely are, so your explanation is appreciated. And your assistance! Thank you. MC { yt is @ starbrightone7 } { website is wwwDOTharmoniccoherence.co ... the ABOUT page }

I've been using Android/google messages on web (messages.google.com/web) for years with Firefox with no issues. Starting today, the page will show the logo for about 10-20 seconds, then loads a blank page. I've tried unpairing, restarting my computer and phone, and restarting firefox. Was there a new update or something that might explain this? Any other thoughts?

So I can open up Youtube no problem, scroll around and even hover over a video for the preview. However the moment I click on a video the tab will crash. I check if this was the case for other video streaming sites. HBO Max has the same issue while Amazon prime doesn't crash however has a message saying there is a problem with the video player. Now I checked if videos can work on another browser (Microsoft Edge), and there are no issues. I have cleared the cache, disabled extensions, checked for updates [update to date: 132.0.1 (64-bit)], restarted Firefox from troubleshooting mode, enabled autoplay, checked if videos work in private mode, updated my graphics card driver, and even checked if Firefox's volume is muted (its not).

Crash ID: 145d84d4-c11c-41a8-9534-e00ff0241105 Signature: [@ std::basic_string<T>::_Construct ]

https://crash-stats.mozilla.org/report/index/145d84d4-c11c-41a8-9534-e00ff0241105#tab-debug

Hello!

After the latest Firefox Desktop updates (not sure which one exactly, since I didn't notice the issue immediately), I've started experiencing a problem with copy-pasting text — specifically with line break formatting on Windows 10.

Instead of copying line breaks using the Windows-style carriage return + line feed (\r\n), Firefox now copies only line feeds (\n). As a result, the text appears as a single long line when pasted into native Windows applications — which breaks the expected formatting. This behavior mainly affects:

• Text editable fields (e.g., contenteditable or textarea) in modern web applications.
• Code blocks or snippets (such as in Markdown or monospace) copied using "Copy" buttons (e.g., in ChatGPT or GitHub).

At first, I noticed this only when copying code from ChatGPT using the code-snippet copy button. But now it happens in almost all editable text areas — if I enter text with line breaks manually, and then copy it, those breaks do not appear properly in native Windows apps. For example:

• In Google Sheets, I often edit text with line breaks in a cell, but when I copy it back, it's all flattened into one line.

Right now, I have to fix this using scripts that replace \n with \r\n, but that's a very inconvenient workaround.

❗My main question is: What changed in Firefox that caused this behavior? This used to be reliable and feels like a regression. It’s a very basic feature and critically important for my daily workflow!

🔧 Follow-up questions:

1. Can this be fixed in a future Firefox update? Will it be addressed?
2. Is there a way to fix or configure this behavior right now via browser(settings, configs)?
3. Is there an extension or workaround that can restore the \r\n format without manual scripting?

Affected apps:

• ChatGPT
• Google Spreadsheets
• Trello
• ProtonMail (regular text copying)
• (more)

Thanks in advance for any clarification or suggestions!

On websites, thumbnails will not display but appear instead as white boxes with small blue question marks. I am using a two year old ipad and my internet speed is 180.

This is a new bug, as of today.

If I click on each thumbnail the image displays just fine, but that is not ideal.

On a reddit forum, someone suggested typing about:config into the search bar but nothing happens when I do that.

Any ideas?

When I scroll some sites with the touchpad, it doesn’t scroll smooth like on windows. It scroll brutally 3 lines after 3 lines. I can’t scroll a half line for example. Even if I activate “smooth scrolling”, it doesn’t scroll with the precision and the speed of the hand. I don’t if It’s a mistake in the code of gecko or in the code of firefox but could somebody fix it?

Hi. According to my observations, only Mozilla Firefox and Adobe Reader have this problem so far.

Windows 11 + Multi-Monitoring Windows 10 have this Bug not !

Open Firefox, drag the window to the second or third monitor, and suddenly there is another hidden Firefox window on the taskbar of that display. If you move Firefox back to the main monitor, it disappears again. Or you can close Firefox and restart it on the desired monitor.

This is an annoying little bug, and I don't understand why Microsoft or Mozilla haven't fixed it yet. It's easy to reproduce and has obviously been around for a while. Since it only affects the two programs mentioned above so far, an MS update will probably not fix it; instead, the developers at Mozilla and Adobe need to address it.

Here the Same Topic in Adobe Forum. No bug fix to date

https://community.adobe.com/t5/acrobat-discussions/taskbar-phantom-window-when-using-multiple-monitors/td-p/14390169

I hope you release a bug fix soon... but since that hasn't happened yet, I'm afraid it will take a while... I'm surprised, because I'm sure many people are experiencing this annoying problem, and in my opinion it's not a big challenge for your developers.

@Mozilla Please Fix this Bug. I know Windows 11 is not better than Windows 10 but Supports End and many Users and Customers used in Future this OS and if you don't want to lose any more market share, it's important to fix this minor bug for ordinary users too. Thanks ;-)