Firefox Community Forum

I often receive a 403 error when using Firefox Every time, before this happens, I get the unsafe website warning and then the 403 error when I continue anyway

I am using the latest version at the time of writing These errors only occur on my desktop PC I have tried to replicate this issue on both my phone (Android) and another laptop(Windows 11) but all the websites work normally on there.

I have tried the following, none of which have any effect:

• Clearing cookies
• using Troubleshoot mode
• Restarting
• Changing Useragent
• Using "Forget about this site"

The following do fix the issue

• Using a VPN
• Using Google Chrome
• Running Firefox in another profile

Going through the privacy and security tab and reseting all the settings sometimes works but only temporarily

The following are a few websites where the issue occurs

1. https://kdice.com/
2. https://latinitium.com/
3. https://theysaidso.com/
4. https://opensource.org/
5. httpe://obsidian.rocks/

I believe there is a memory leak (or memory growth) bug in Firefox 133.0 on Windows 10. It's site-specific. I am trying to login to my account at https://www.ssa.gov/, and it never actually gets to the login prompt. Using the Windows task manager, I can see the RAM usage keeps increasing, until it nears the 12 GB installed RAM capacity, at which time I kill the firefox process. I'd say this is a bug in ssa.gov, except the problem does not occur with the google chrome browser.

To provide further detail, I go to site https://www.ssa.gov/, and click on the "sign in" button. That takes me to the page where you choose the login method (id.me or login.gov) and I choose "id.me". It takes me to the "you are leaving Social Security's website " message, which is still on the ssa.gov website. At that point, firefox memory usage starts to increase, as shown in task manager. The browser never advances to the next page, but main memory usage keeps going up. This goes on for about 30 seconds before I have to kill the firefox process.

Cannot Log on to Costco.com site after update to Firefox 133.0 in Win 10 pro on 2 computers. Both are up-to-date with latest software.

Entering valid account and password cause the Costco logon page to freeze for a minute then returns to log on screen with no messages about failure

Same behavior on two computers. Log on to Costco via Microsoft Edge works perfectly (on 2 computers before any trouble shooting ). Logon with Firefox 133.0 works with every other site that I regularly use - Samsclub, Amazon, Yahoo mail, my own mail servers, NYtimes, WashingtonPost, Google, Walmart, and others

Trouble Shooting Steps taken with no change in the problem logon to Costco + Cleaned cache / cookies + Disabled virus protections + Disabled firewall + Stopped all security services + Rebooted + In settings | Privacy & Security: Added Costco.com as Exception for Enhanced Tracking protection + In settings | Privacy & Security: Added Costco.com as Exception - Cookies and Site Date

hello all,

I'm running Firefox 115.18.0esr For a month now, tabs have crashed constantly. That is, *every single tab* crashes sooner or later and usually it's sooner. It's making Firefox unusable.

I know my desktop is old and my OS is considered obsolete, but still, I'm a fan of Firefox and want it to work. I'm running OS 10.13.6 (which I can no longer update) on a iMac mid-2011.

Any advice much appreciated.

Google Drive says i am offline when i am not. Can move around the site, and it works fine on chrome, but not on firefox. Can also acces sheets just fine, and acces some files through there

tried contacting google, but since it was a firefox specific problem they could not help

When open Google Drive using Firefox, I cannot click on any documents. I can open folders but the documents in these folders I cannot open. I can open Google Docs and then access documents but all documents through Google Drive including in the Shared Folder are greyed out and when I click on any of these I get the pop up "This file cannot be opened because you're offline." I can access Google Drive and its documents using Chrome. I would prefer to use Firefox.

I have updated Firefox, cleared the history, and emptied cache and cookies. I also logged out of and then back into my gmail account.

The image shows what the drive looks like when opened in Firefox.

I recently installed Firefox version 133.0 on my Linux computer (Zorin distro). I intended to make one of my HTML files my homepage and it gives me a File Not Found error message. Then I tried to open another HTML file and the same thing happened. How do I correct this?

I have a 2023 MacBook Pro and a Synology NAS. Fairly recently, when I have tried to access the web site for the NAS using Firefox, I have received the following error message: "Unable to connect. An error occurred during a connection to [the IP address].” I am able to access the web site using the Safari and Bing browsers, and I also am able to access the web site using Firefox on an iPad. I already have contacted Apple and Synology support personnel, and have been that the issue is not with either Apple or Synology products. Please let me of any potential solutions to this problem that Mozilla may have.

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?

My cat walked across my keyboard and now video does not play on the peacock webpage. Video playback is normal on all other webpages when using mozilla. Peacock is the only one im having issues with.

This happened too much, like 6 times when using firefox in this month. I dont want to shut the program because I got unsaved notes in it. I was listening to music and it just began to play it non stop. and it dont respond.

please help, a million thanks!

I try to restart network or suspend the process nothing works. If I could make firefox reopen to it's original state+ cookies; no site reloaded and get back my incogico it would be much appreaciated. ALso everything was saved in firefox since I did not end the task, I dont want to lose those.

I just reinstalled FF because I was getting an XPCOM error message, and now, when I try to sign into my ATT.COM site, I get an error message that I can't get past; https://oidc.idp.clogin.att.com/mga/sps/oauth/oauth20/authorize?response_type=id_token&client_id=m14186&redirect_uri=https%3A%2F%2Fwww.att.com%2Fmsapi%2Flogin%2Funauth%2Fservice%2Fv1%2Fhaloc%2Foidc%2Fredirect&state=from%3Dnx&scope=openid&response_mode=form_post&nonce=PUKPnPRT

Prior to reloading FF, I did not have this problem.

Hello everyone.

I've been having some issues with Mozilla lately. I don't know if my CPU is in bad condition or not but, when I change tabs through my Windows, say changing tabs from Mozilla to Spotify and changing it back to Mozilla, my CPU gets very full, causing my cursor to lag, and Mozilla to be unresponsive for a couple of seconds first and it gets kinda worse as I continue to use my PC, causing the lag to occur for over 10 seconds.

I have seen some similar complaints on the web but they date back to 2014ish times.

What do you think? Is it somewhat my CPU's problem or did Mozilla's handling get worse over a patch or something?

I enjoy Mozilla and don't want to quit using it. Any help would be much appreciated.

Today I was no longer able to stream movies on Amazon Prime or Youtube. I watch Amazon movies most nights, watched last night. Tonight I got a message when I tried to continue watching a tv series on Amazon that I've watched for weeks. It said I had to update Firefox and told me how, but when I went thru the process Firefox said it was up to date. On Youtube I got an error msg. 99,999 . What is happening?

Recent issue (Nov/24): when logging into some sites I've used before, the Send, Pay etc button doesn't do anything. If I do the same login on Chrome, it works. Also finding Hotmail too sluggish to use on Firefox and forced to use that on Chrome as well.