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Apparently MS has changed something in their OAuth2 and Thunderbird has yet to catch up. I've seen several other questions regarding this, but no workable solutions, just silly replies. Is TB actively working on a solution or am I now forced to install Outlook?

I currently have Thunderbird installed on both my android and desktop (W11). My android inbox does not mirror my desktop. For example, desktop inbox shows many more emails than the android inbox. The ones that are in both are the same. Why doesn't the android inbox mirror the desktop version?

Additionally, I used receive a ton of junk mail when using Edison mail. Now I receive very little. Sounds like a good thing but occasionally one gets flagged as span and it isn't. They continue to show up in the Edison mail spam folder but not in Thunderbird.

I was hoping to drop Edison mail and use Thunderbird exclusively, but I need the confidence before doing so.

I don’t know why it’s Impossible to get the connexion to helsana.ch on Firefox. Could you help me how to find a solution ?

An error occurred during a connection to ms.now. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Learn more…

yes, althouth i have mozilla firefox as the default in my T moblile adroid.main settings, but when i click on mozilla app and do a search, default in address bar is Google?. do you have URL path so I can add it to the list.( e.g. we have Google Bing, Duck, Perplexity, etc, but No Mozilla Firefox to select). thank you

Thunderbird email send stopped working something like three weeks ago. I am using Fedora 43. What happened to cause this send problem? I had been using Thunderbird for a very long time with no problems. I am using Mozilla Thunderbird 147.0

Shortly after upgrading FireFox, whenever I try to go to a website, like PayPal or my bank or anything else, I immediately get a large Ad/site for something frequently related somehow.

Like my bank I will get something suggesting an online bank, or ways to make banking easier. It will be a large window, covering my original window. I have to exit THAT site to get to the one I want.

It is a separate window, I cannot just X it out, I must shut down that window. Then the window that I actually want will be beneath it.

I can't figure out how to fix it.

Macbook Air, Sonoma 14.6.1 Firefox up to date

Moderator note: This question has been edited to correct the formatting.

I am using 147 ESR and when I go to permissions and block all cookies for the site plex.tv the cookies are not blocked. If I go to the URL field and select the lock, it shows "clear cookies and site data" which means the cookies have being accepted.

Why are the cookies accepted from the site when I have set cookies "blocked"

Since 148.0 version o Firefox I can't load pdf document from online e-mail. The document open in a new window but If save it I can only save it in html. not in pdf. It works only, if I use the print option.