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Hi everyone,

I run a construction estimating construction estimating website where we share project-based cost estimates and detailed breakdown for contractors, architects

I’ve noticed a weird issue in Firefox lately.

Some of the heavier pages (especially ones with large tables, detailed breakdowns, and embedded content) start getting really slow or sometimes even become unresponsive in Firefox. The same pages load completely fine and smooth in Chrome, so I’m trying to understand what Firefox might be struggling with specifically.

I already tried the basic stuff like clearing cache, testing in private mode, and disabling extensions, but the issue still keeps coming back.

It seems more noticeable on pages with a lot of structured data and embedded elements, so I’m wondering if it could be a rendering, memory, or layout issue on Firefox’s side.

Has anyone dealt with similar performance issues on Firefox with data-heavy or content-heavy web pages?

What should I look into next — layout structure, CSS rendering, JS execution, or something Firefox-specific I might be missing?

Any guidance or debugging tips would be really appreciated.

Recently when typing on Firefox on the duckduckgo search engine, anything you type gets doubled, and you cannot backspace. The issue doesn't occur when on Google page, only on ddg. I also tried different keyboard apps and the issue still persists. I went to the same page on Google chrome and the issue does not occur. This just started happening within the last week or so. If it matters/helps, I'm on Samsung s24 ultra.

After latest update Firefox Developer Edition 151.0 Beta 4 I noticed much slower website loading while using few containers at the same time and overall more lag. Before the update everything was great and smooth I hope it's gonna get fixed soon.

hi, I have this odd issue lately that when I type something in the browser, search engines in particular, then hit the enter key on the on screen keyboard, and then click inside the same inputfield again that the backspace button switches behavior and no longer affects the text field but deletes the last letter from the word in the auto-correct-suggestion panel diirectly above the keyboard. clicking back into the browsers textbox doesn't help either. I have to press backspace several times until auto-correct stops suggesting new words, (turning off auto suggest doesn't fix it) then focus returns to the inputfield in the browser

I can repro it with multiple keyboard apps (microsoft & heliboard), on different search engine websites but it only happens in Firefox not in chrome nor any other Android app.

I also noticed that when I move the text cursor somewhere with a tap in this input field and then hit backspace, then it will show the context menu (copy, paste, insert...) for less than a second and instantly close it again. Pressing backspace a second time doesn't trigger it again until you move the input cursor with a tap again.

I only use uBlock but disabling it didn't help. Phone: Nothing 3

Ever since I got the 150.0, the issue is the following: when I use the AI feature or search something on the internet, the first time everything is OK. If i would search something else or reply to the AI feature, the text appears to be doubled. In example

II wantwant toto knowknow thethe basicbasic signsign languagelanguage formatformat

I often keep many tabs open for research, and Firefox memory usage grows significantly over time. Are there practical settings or habits that help manage memory without sacrificing usability?

I love Firefox and have used it forever. But its memory usage is killing me lately and I'm seriously reconsidering.... PC, Win11, Intel7, 16GB memory. (I'm typing this from Chrome)

I've updated, restarted, but it keeps maxing out and slowing my computer to a crawl. Somebody please tell me there's a fix pending?

Latest version(s) of Firefox on my Android 16 Samsung Galaxy 25 Ultra are not happy - go to open a new tab and the entire app freezes - after about 10s I get offered the option of waiting - which does nothing, the same message reappears again 10s later - or closing the app.

Have been trying to find resolution as Firefox is my browser of choice but nothing so far besides reverting to an old build of around 140 and refusing to upgrade.

Please can this be looked at as a priority - reading up I believe a number of Samsung users are experiencing problems with the newer versions all focussed around the tab system.

My name is Dr Tahmeena HazratyOmid. I use Firefox on my Android phone. Recently the browser became slow and YouTube videos do not play smoothly. I tried restarting the phone but the problem is still there. Please help me solve this problem.

When I launch Firefox, it uses well under 1GB in memory, but then it starts to increase that amount quickly in just a few minutes and gets up to 50+GB, causing error messages to pop up repeatedly until it uses all resources and locks up my computer. I have updated my MAC OS and the Firefox app, uninstalled the Firefox App and still have the same problem.

Please help

Sporadically over the past year, a virus warning, purportedly from Apple, has locked my FireFox screen. I must Force Quit to unlock FoxFire. See images. Is this a scam?

I have a two monitor setup. Since I installed the new AMD driver (26.1.1), sometimes when I play a game on my main monitor, and watch stream on Twitch in Firefox on my second monitor, it can cause the PC to freeze completely. I hear the sound, but the image is stuck.

I tried to disable the hardware acceleration in Firefox, and it seemed like a good solution. But because of that (which is its function), sites became laggy.

Is this a Firefox, or an AMD issue? Or Windows (I'm on Windows 11 25H2)? I will try to install an older AMD driver, but honestly streams had became laggy before the driver update for me.

После включения ПК бывает, что я не могу ввести текст в браузере.(как буд-то включается режим только для чтения, что не позволяет текст ввести). горячие клавиши работают, но текст не вводиться только в браузере. Оно само по себе проходит. Как это исправить?