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Unable to get firefox browser to function, keep getting errors or lockups, HP desk top windows 11, firefox verson 153.0

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I had opened a support ticket #447010 with Mozella support and they told me that they can not help me, and sent me here. I am "dead in the water" so to speak. It appears that since Firefox downloaded update 153.0(20260715202819) I have had many issues that appear to be getting worse by the day, and now I cannot open or run my email app. I have not wrote down all the errors (sorry) but here are a couple: 431 Request Header Fields too large, the application is having trouble connecting to the server, unable to load the email from Mozella support. After the update (153.0) my bookmarks have moved to somewhere, the sign on for my email app has changed ( use to click on the firefox icon on the bottom tool bar and the sign in box for optonline.net would be there. I understand that sometimes updates (new and improved) make changes to what users have use to for years. Now is have a browser that is not functional and needs to be corrected, I trust you can help and get this sysem usable again, because right now it is not usable. I presume if and when you respond to me issues it will be at this location and not an email. Please help. Thank you

I had opened a support ticket #447010 with Mozella support and they told me that they can not help me, and sent me here. I am "dead in the water" so to speak. It appears that since Firefox downloaded update 153.0(20260715202819) I have had many issues that appear to be getting worse by the day, and now I cannot open or run my email app. I have not wrote down all the errors (sorry) but here are a couple: 431 Request Header Fields too large, the application is having trouble connecting to the server, unable to load the email from Mozella support. After the update (153.0) my bookmarks have moved to somewhere, the sign on for my email app has changed ( use to click on the firefox icon on the bottom tool bar and the sign in box for optonline.net would be there. I understand that sometimes updates (new and improved) make changes to what users have use to for years. Now is have a browser that is not functional and needs to be corrected, I trust you can help and get this sysem usable again, because right now it is not usable. I presume if and when you respond to me issues it will be at this location and not an email. Please help. Thank you

Alle Antworten (6)

Sorry this is happening to you! You could try to Fix the "431 Request Header" and Email App Error. Clearing out your Optimum data will force the login screen to load freshly. In your normal Firefox window:

- Click the three horizontal lines (menu) in the top-right corner and select Settings. - Click Privacy & Security on the left menu. - Scroll down to Cookies and Site Data and click the Manage Data button. - In the search bar that appears, type: optimum - Click Remove All Shown. - Now type: mozilla and click Remove All Shown (this fixes the support ticket email error). - Click Save Changes and click Remove to confirm

Hope that helps!

Mariam: Thank you for the response. I did steps 1,2,3 there was not a "Manage Data Button" step4 there wasn't a "search bar", step 5 did not happen, step 6 there wasn't place to type mozilla, step 7 no "save" button Sorry nothing has chaanged. Rich

Hello: The actions Mariam suggested did not work to fix these issues. I see a new Firefox update,153.0.1 has been released. I am not sure I want to install it until these current issues are resolved. Recap Issues: 1, can not access email, when clicking the email nothing loads or appears (no text) 2, 431 Request Header Fields Too Large 3, ran Firefox trouble shooting - nothing happened 4, Get help - 502 Bad Gateway error 5, email app - the application is having trouble connecting to the server 6, other issues that I have told you A reminder that I am not able to use email on this browser. I am quite able to receive/send/print email on optonline.net on my phone, ipad, mac book. Please let me know if these issues are fixable or do I need to give up. Thanks

Hello: I am back. 1, had best buy geek guys attempt to fix the issues we have been discussing, they provided remote support for an hour and half. say they didn't find any issues with the computer, still have the same issues. 2. Downloaded Firefox update 153.0.1 and it did not happen, still show that I am on version 153.0, don't know if that means anything to the team. 3.Geek guys implied that it might be Optonline.net email issue, I will go to them, however I receive full functional optonline.net email support on my phone and 2 Ipads with no errors. 4. It is very interesting that the new update (153.0.1) did not install, what do you think about that? I trust you are still with me on this. Thanks

Attention Mozilla team: 1. Firefox version 153.0.1 has loaded and shows in the about Firefox as current version, so currently running on that version. 2. I went to my Firefox sign in icon and it brought up Optonline.net as it is suppose to . 3. I am now seeing my mail in optonline.net without error codes. 4. I will presume that the issues I have been having have been corrected? and move on. 5. Now I just have to find where my bookmarks have and get the home screen to look like it did, I think that is on me and not your team. Thank you for your support and patience I was about to leave you, glad I did't. loyal Firefox customer

Great, that sounds like you just ran into an update issue. Now when the install is stable, the next step would be to find the old data.

Could you perhaps try to follow Recover user data missing after Firefox update or reinstall in case the whole profile just got disconnected during all of that, and you'll just be able to switch back to it?

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