Diễn đàn hỗ trợ Firefox

Hi everyone,

I’ve noticed that Firefox tends to use a lot of memory when I run several browser-based tools at once — especially web calculators or dashboards that update data dynamically.

For example, when I’m testing a lightweight web calculation app (something similar to a gratuity calculator that updates values in real time), Firefox memory usage slowly increases, and sometimes the browser even freezes if multiple tabs are open.

I’ve already tried:

Clearing cache and disabling extensions

Running in Safe Mode

Using hardware acceleration on/off

Still, the problem persists.

So I’d like to ask:

1. Are there any specific settings or flags that can help manage memory usage better for interactive web tools?

2. Does Firefox handle JavaScript-heavy calculations differently compared to Chromium-based browsers?

3. Any recommended performance tweaks for developers testing such tools locally?

Would really appreciate advice from anyone who’s optimized Firefox for this kind of lightweight, web-app testing.

Thanks in advance! 🙏 bold text

hi in a new win 10 instal most text incl Fire Fox and t bird 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 can if any one can help  thanks

Hello, I'm using Firefox on Linux Mint. All of my homepage shortcuts have disappeared without the option to add them back. I tried toggling the shortcuts option on and off and nothing happens. Nothing also happens when checking and unchecking the sponsored shortcuts setting.

Hi

i use Mozilla at work, in logistics.

When booking shippments we use "nShift". Booking is repetitive, so the autofill function (in swedish its autofyll) is pretty useful, and we have used it extensively...now for some reason it has just disappeared and we cant get back.

See uppploaded imgage, tried to follow the instructions,..... also in my edition there is no subheading caled "Formulär & autofyll", it just says "Autofyll".

So the question is, what to do to get the autofill back.

Thnaks for all the help i can get.

///

!. link to youtube only flashes then plays only audio. Full video requires opening link in a new private browser window

2. Typing into search bar for Duck Duck Go in new tab page types directly into active bar...

3. Active bar is no longer at the top but is in Bookmarks toolbar...

I suspect some update problem.

Hello, I have spent the last couple of hours reading through other questions and posts but nothing seeemd to work. If I try to copy a shared link in OneDrive or SharePoint on my desktop and then paste that link into Outlook Web App, the paste function does not work. The option is there, but the actual pasting does not materialise. CTRL+V also does not work. The only thing that does work is if I paste the link into another window first and then copy again, and the CTRL+V works. Right click and paste never works. I have tried this in a private window and in safe mode. I have also checked the clipboard settings in about:config to make sure they are not working against me. It works fine on Chrome. I made a quick Loom to demo the issue: https://www.loom.com/share/911ae68d614947aa9ea6beaba0d2f5b0?sid=2257b601-939b-4d95-90d8-bb2c95b1ed81 Firefox is up to date, as is Windows. It has been like this since I moved over from Chrome a few weeks ago. Is this a common issue or a 'me' problem? I have seen all the workarounds, but I am trying to understand why right-click, paste just doesnt work. Any suggestions are much appreciated.

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

Every time I boot Win 10 Pro, a half dozen Firefox pop-ups complain as indicated, as well as the wrong google page login (Voice instead of Calendar). There is no Firefox showing in the Windows>Task ManagerStartup> list. Firefox(143.0.4 (64b))> settings>General> Startup> has only [check for default]. I cannot find the controlling 'Startup' controls.

hi team, recently i can not open any PDF when i am in gmail using Firefox Browser is updated to latest verison, i have also check settings under application and whatever i choose, when click in PDF in my gmail, i can not open it directly, i need to go right click on it, open in new tab, then it downloads to my PC and open in new tab?. stupid isnt it? i have tried many settings and nothing seems to be working, any chance that i can just click on PDF and it opens in new tab or my Adobe app, without download it to my PC, cause sometimes i just want to see wtf is the attacment...

cheers,

The newly added PWA support is neat and was much needed. However there is an issue with the PWA icons under Windows, in the Start menu. In the all programs tab the icons are correctly the icons of their respective websites, but if the icon is pinned as a tile it switches to the default firefox icon making it hard to tell them apart at the first glance. The issue is present under Windows 10 and also Windows 11 How to recreate: Win10: -add a tab to the taskbar as a PWA -open Start menu -pin the PWA Win11: -install ExplorerPatcher and change the useless clunky win11 Start to the almighty and productive win10 Start -add a tab to the taskbar as a PWA -open Start menu -pin the PWA

Is there any way to fix the icons of pinned PWAs?

Dashlane not autofilling for a particular site - https://complete-deputy-report.service.gov.uk/login

Also, Dashlane DOES autofill cirrectly in latest versions of MS Edge & Chrome

Firefox 143.0.4 Dashlane App 6.2539.0 OS Windows 11 Pro v 25H2 Build(26200.6725)

I'm having trouble installing Norton Password Manager, I keep getting a corrupt file, won't install, so I am running through the checklist of possible fixes.

The one I am up to is this :-

Refresh Firefox Click the menu button (≡). Select Help, then choose More troubleshooting information. Click the Refresh Firefox… button on the right side of the page. In the confirmation window that appears, click Refresh Firefox. Firefox will close and restart. When it finishes, a window will show the data that was imported. Click Finish. Choose whether to restore your previous windows and tabs, then click Let’s go!.

I cannot find the "Refresh"

I've run Troubleshoot Mode

I have cleared the startup cache, problem not fixed.

https://drive.google.com/file/d/1Xc4TJomqETKUOMIa9y1IgVD_alu_dIlg/view?usp=drive_link

Apparently y-all aren't to smart to understand the your customers do change their telephone numbers and email address from time to time. It appear to be to smart to have instruction to alert you customers to the location of the forms to be used to change passwords, customer names and email address. ya think?????????????

After instalation Eset Smart Security 18.2.18.0 with full security browsers my Firefox is run only in read-only mode. If I will be disable option Security browser and run Firefox that's working. Next I will be enable option Security browser then Firefox starts with green frame. After close Firefox and next run then starts read-only mode. Eset Team is not fair play becouse resolving problem only disable option Security browser. So why is there an option that prevents Firefox from launching? All my portable browsers without Eset Security working without any kind of problems, for example Tor, Opera.

When I do "save as " action for an image in the browser it opens dialogue window to save selected image. Unfortunately it displays files and folders in some random order, rather than my preferred order (sorted alphabetically by name, followed by sorting by type).

I can see no rhyme or reason to the way Firefox lists files and folders in the dialogue window, so every time I am saving an image I have to sort things by name and type before I can find what I want.

This is not permanent so I have to repeat this action every time I save an image.

How do I, please set application preferences? to make this setting permanent?