Diễn đàn hỗ trợ Firefox

Hello, I have Windows 7 and I use Firefox ESR as my browser. It has work correctly for years now, but since a couple of days it has problems with downloading the latest updates. It asks me download the update but as I go into the settings page, the download is stuck at 0 kB. I also get a message box that FF is not able to download the update and it sends me to a Mozilla Firefox ESR download page and when I want to download the ESR version, FF cannot open the page with the installation file. Also many other links on the Mozilla page do not open or do not open correctly. Also it doesn't open this support page, I am writing this messages through my phone. Also it doesn't open the website bol.com. So what can I do. I have already tried clearing the cache and cookies. It doesn't help. I hope you can help.

Firefox runs some sites slows on one of my Windows 10 computers.

I'm running Firefox on 4 Windows PCs and 3 of the 4 work just fine using the same synced profile.

Fidelity.com and Amazon.com are 2 of the sites that are very slow to load. They will eventually load, but clicking on any links causes another slow load.

The same web sites are fast when I use MS Edge.

Troubleshooting steps I've taken (none of which have worked):

• Refreshed Firefox
• Created a new profile
• Uninstalled Firefox leaving my old profile
• Completely uninstalled Firefox and deleted my profile

Any thoughts on troubleshooting steps to take?

I've done recent updates (May 2026) and after having 3 updates in recent months, I still have difficulties with my video programs (both Zoom and "One-click) slowing down during my work which is 100% virtual. How can I revert to an earlier version where this was resolved, please!!??

We had a power outage in our area. Afterwards when the power was back on I could no longer get CNBC.com to work properly. It kinda opens but nothing goes live nor do the videos play. If I switch to Chrome everything works, but I like Firefox! Lynn Nichols

An error occurred during a connection to tpz.sashacare.com. SSL received a record that exceeded the maximum permissible length.

Hi all,

I have another query ongoing which trying to fix seems to have caused this problem: https://support.mozilla.org/en-US/questions/1581166

I'm logged into Firefox account and have everything synced. I've logged multi-account containers (MAC) into my Firefox to try and sync accounts. However, the containers are not syncing AND I now cannot send tabs to or from this instance of Firefox.

This started either after I refreshed Firefox or after I reinstalled it, I'm not sure which. Before Refresh I definitely had full sync, and I believe containers were synced but I had not changed anything in MAC for a long time, many months maybe years.

To try and fix this, I logged out of my Firefox account for both MAC and the whole browser, then closed Firefox. I then restarted Firefox, logged into my Firefox account and tested that I could send and receive tabs - I could, so that worked. I then logged into my Firefox account with MAC and tried to send a tab, and I couldn't, and nor did the containers sync. So, it seems that the MAC addon breaks sync.

A workaround is just to not depend on containers sync, but I'd prefer to get this back.

Any suggestions on how to fix this, or is this a bug in Firefox or MAC?

Cheers :)

Hello brothers and sisters, i am need help! I'm experiencing performance issues when surfing the 9GAG website. The amount of RAM consumed by this page is growing exponentially. It's gotten to the point where this tab can consume up to 5GB of memory, and that's not the limit. This issue hasn't happened before. I can't figure out what's causing it.

What I did to fix the problem: I reinstalled the browser. I reinstalled add-ons. I reset my old profile, saving only bookmarks and passwords. I reinstalled the operating system. None of this helped. However, my friends don't have this problem with this site. Please help.

Hi all,

After the last update the former Mozilla Test Pilot "Snooze Tabs" isn't working for me any more, I tell a tab to snooze and it just stays where it is. https://addons.mozilla.org/en-GB/firefox/addon/snoozetabs/

I've tried running with addons disabled and then running with addons active again and the behaviour is the same. It's the same behaviour whether I run from the toolbar or the context menu.

I'm presuming this problem is related to Firefox update mechanics. Any suggestions for how to get this working again please?

Cheers :)

Hi, Lately I haven't been able to add a bookmark icon on my 4-row new tab page. There's still to empty spots I would like to fill but can't find the usual + button. Thanks for the help

with the last and now the most recent Facebook versions i ahve beem having problems with Facebook, now it may be Facebook but i have it more on Firefox even with extentions shut off i get i what is it please help

I Can't log in to my for Firefox on my new Linux Mint laptop. It's asking 2FA but I can't see it on my proton authenicator. My username and password are ok. Then the 2FA box pops up asking me for the 2FA code. And I can't log in now to sync my Android Firefox with my Linux Mint Firefox. I recall setting up 2FA some years ago on Proton but don't recall ever using g it other than one. Can you please help?

Change my password word try to open from apple app keeps coming up. Down load was interrupted why. Also before I change my password word this was coming up as me 55npst5p6d Lost all my browser history an book marks can I get them back?

I noticed that some sites are showing up twice in the history when you go to history and look at the sites you've most recently been to. At first I assumed it was happening just with Youtube, but I have noticed it with other sites as well. This started happening a day or so ago. I recently updated to version 150.0.3, and I have no idea why it's happening. At first I thought it might be because I was signed into sync, but this hadn't happened on previous versions of Firefox and I've been signed into Sync for almost a year now and never saw this occur in that time. I even tried signing out of sync to see if that fixed the issue. it did not. I vaguely remember something like this happening on a much older version of the browser, but I dunno if you guys ever had a fix for it or not. I'm including a screenshot of the phenomenon for the sake of visual reference.

I can access Chewy with Safari, but not with Firefox. So the problem is not with my Mac settings and the problem is not with Chewy, the problem is with Firefox. Please address and fix it.

I am using Win 11, Microsoft Powertoys > Fancy Zones to manage the screen space on my 5120 x 1440 monitor. I also have System > Display > Multiple Displayers "Remember window locations based on monitor connection" enabled.

Any program I have besides FF will load up exactly where I had it last. FF shifts I am guessing 8 pixels to the right (or left, as this occurs if I close FF on the right side of the monitor.) If you look at the screenshots, the "opened at default" picture shows what FF looks like when I open it. You can see the xulstore.json file shows the screenX position is -8. If I manually type in 0, close out FF and reopen it, it will still shift back to the right a bit even with the .json still saying 0

How do I do one less thing when I turn the pc on and have FF open exactly as far left as possible instead of shifting over to the right?