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Other browsers work but Firefox suddenly refuses to access the internet. The error messages I get are: Unable to connect

 An error occurred during a connection..

and Secure connection failed - error code PR_CONNECT_RESET_ERROR Firefox had been working ok, and the problem appeared suddenly when I started the computer Windows 11 I would really appreciate any help.

Ever since the last firefox update, an icon appears on my desktop when I go online in the morning. Multiple deletions do nothing. I would like the icon off permanently. I keep a pristine desktop.

I have Thunderbird set to 1. fetch headers only and to 2. leave messages on server 3. until I delete them when I press the "Get Messages" button to get the headers from my POP mail account. I generally delete about half of the headers before downloading any messages and then generally delete most or the messages I've just downloaded and read.

   The next time I push the  "Get Messages" button, the number of recieved messages is generally incorrect. It's as if Thunderbird is asking the server for the number of new messages before deleting the messages I have deleted on my computer from the server.

Thought someone should know.

Note: Empty trash on exit is also checked.

My Firefox is using a lot of data; I don’t know why.

I am not using Firefox, and it is not running in the background, yet it is always using the internet. So what do I need to do in this situation? I tried to stop the internet connection using outbound rules, but it did not work. It is still using the internet. What is the reason my browser has high data usage? I have high data usage; in fact, in the past 12 days, we've used 30+ GB of data.

Hi

I just bought a new MacBook Pro running Sequoia 15.2 and one of the first things I did was install Firefox as my primary browser (I am running 134.0.2). I prefer Firefox over Chrome and Safari. I am having two issues and can not figure out how to fix the settings and don't want to guess and open myself up to privacy/security settings concerns. I have tried looking in the Knowledge base but am not seeing what I specifically should do....and would really like your help.

1. 1. I used to be able to go to a website where I have an Account and "Sign In with Google." Now if I try to do that....it seems to be TRYING but never connects.... :-(. I did install your

1. 2. I used to be able to "insert a photo" (png file) into an email (Gmail)...and now it says "Error Occurred." Can you please help me with whatever settings I need to change to fix this issue??

When I open Safari and try these exact same tasks, it will let me with no problem. So I know the issue has to do with my Firefox settings.....

Thanks for any help you can provide.

My laptop (a Lenovo Ideapad220s) did an automatic Windows 11 update (I believe it was the 2H24 update). After that Firefox (version 133, 64 bit) would only open with the message "Gah. Your tab just crashed". Nothing I tried has worked, not any of the remedies found in support pages. I somehow did a Firefox software update and it shows as a separate icon and has not migrated any of the passwords and bookmarks I had in the software version that keeps crashing (my default browser). Trying to get access to the encrypted passwords to the many sites I've got with Firefox I opened the browser in troubleshooting mode. In this mode I have access to all the passwords saved over time, and the browser seems to work fine.

Any suggestions on what I need to fix or if this is related to the Windows update? I'd like not to have to go through the two-step process to use the browser.

Thanks!

I run a little server at (let's call it) nc.example.com, for external access I use Cloudflare tunnel/proxy and have no issues, but for internal LAN access I have a little nginx reverse proxy with a Let's Encrypt certificate on it and custom internal DNS.

With Firefox (only Firefox; curl, Chrome, and Edge have no problem), the first time I browse to the site (after opening Firefox, of after not interacting with the site for a couple of minutes) I get the SSL_ERROR_BAD_CERT_DOMAIN error after a wait of about 30 seconds, the site uses HSTS, so Firefox refuses to talk to it. Pressing Ctrl-F5 after getting the error loads the site as if nothing happened.

What is really annoying is that the Advanced info shows "Firefox does not trust this site because it uses a certificate that is not valid for nc.example.com. The certificate is only valid for the following names: *.example.com, example.com"

I get pretty much the same result if I use a certificate just issues for nc.example.com or for "nc.example.com,example.com".

Probably related, but with different results, if I use a certificate issued to "nc.example.com,*.nc.example.com", Firefox immediately tries to go to www.nc.example.com, which doesn't exist.

Note I have looked at the results of clicking on SSL_ERROR_BAD_CERT_DOMAIN in the error page and did a character-by-character comparison of the PEM format certificate displayed there with the actual full chain PEM certificate file on the web server and they are identical.

A message that the browser doesn't trust a site because it has a certificate not valid for SITE-A, and then says the certificate is only valid for SITE-A sure seems like a bug to me.

I have a new Macbook M4, with Firefox 134.0.2 as default browser and Thunderbird 128.6.1esr as defaukt email application. When both are running, I often get the following problem:

I click the red close dot (pardon me if I don't know the terminology) on the upper left to close Thunderbird. Now the same red dot in Firefox vanishes--not greyed out, it simply disappears. I can't close or minimize (yellow dot) Firefox.

When I attempt to reopen Thunderbird by clicking the icon in the dock, nothing happens. It won't open.

I quit Firefox with cmd-Q, and find this (see attached screen shot): a little white square in the upper left corner, which does not open or change when I click elsewhere on the desktop, and a truncated Thunderbird menu.

I have no weird add-ons in either app.

Finally, if Firefox is not running, I don't experience this issue with Thunderbird. Only when both are active. It thus seems like a Mozilla bug. I wish I can solve this, as it drives me mad. Note also that I've used Firefox and Thunderbird in Windows for many, many years without problem. I have just switched to Mac for the first time and am a completely inexperienced Mac user.

Taskmanager shows dozens of tabs in the browser open when I have just 2 or 3. I close firefox and reopen and have the same issue. I have tried all of the suggestion from the community page, as well as, online suggestions. This issue is causing my laptop to run very hot.

Michael Rozelle m.j.rozelle@comcast.net

Whenever I'm on Firefox, I have just a couple of tabs open -- no more than 4. However, Firefox quickly becomes very slow, especially on Google apps. When I run Task Manager, it seems that 13 or more tabs are open. And just now, when I tried to open a draft email, Gmail told me I'm already working on the draft in a separate window -- although no such window is open. I am very careful about privacy and pop-ups, so I don't understand why all these hidden windows and tabs are running. How do I stop it?

As of today (?), on certain websites, such as Reddit, or on certain elements of some websites, such as text on Google Search's accordion components, Japanese text is suddenly being rendered in Chinese (see images). I have seen reports about this by other users (on Reddit).

This is fixed if `ja` under `font.cjk_pref_fallback_order` is moved to the front. However, I found a comment on Bugzilla stating that the `font.cjk_pref_fallback_order` setting is only honored if Firefox can't determine system font preferences, but `about:support` lists my locales as ["en-AU","ja-JP"].

Probably a bug?

Hi I would like to open a webpage as that I saved as a folder. I have a folder with over 300 files. I tried opening the different HTM files but it does not work. What should I do?

Hi,

I run my own mail server using Dovecot with the Virtual Mailbox feature to run some server side searches.

The folders contain the email that matches the criteria as expected but the message list (e.g. flagged email) does refresh (either waiting or clicking the Get Messages button) when a message is unflagged in this example until I restart the client. I am using the option "INDEX=MEMORY" which is meant to allow for this.

The issue does not occur with Thunderbird on Android, only my Desktop client on Linux.

Anyone have any suggestions?

Thanks,

Adam

Hi. Just recently firefox, which has been faultless for a long time, is now occasionally giving me "hmm, cannot find this site" messages for Google and BBC. Duckduckgo and chrome are operating normally.

What is the cause of this aberation?

When loading certain pages (on web application) the motion icon starts and after several seconds it changes to the sand clock icon despite the setting described in 'https://support.mozilla.org/en-US/questions/1303416' being done - ui.prefersReducedMotion set to 'false'. My work is all done in this web app and it is very important to see when data is being uploaded (grey/black dots) and when the page is supposedly being refreshed with updated data being downloaded (blue/green dots). Why is the preference being ignored and how to fix it so you always get the motion?