Firefox Community Forum

I have been building websites on and off for many years using Notepad++, HTML, CSS, JavaScript, and PHP. During development and maintenance, I heavily use Firefox and Firefox Developer Edition on the computer where I build the sites (both editions are affected). I also have many notes on an offline website.

Recently, the links in these offline websites no longer work in Firefox. They function as usual in Microsoft Edge and the newly installed Vivaldi 7. They also work on an old laptop with an older version of Firefox. I think the issue was introduced in one of the recent updates. Could you please look into this? Otherwise, I cannot use Firefox as an offline browser and the developers add-ons on my laptop anymore.

Kind regards, Martijn de Jong

I sent this message to Mozilla support in Dutch and would like to send an English translation as well.

Do you have a solution for this issue?

Firefox will not start up after latest update earlier this week. Troubleshoot mode or refresh does not work either. Clearing caches, restarting does not work either. Worked great before latest update.

My firefox icon goes up, but it says its not running, I believe I have the latest update, Its been doing this for days. I am not computer savy, so how does this get fixed?

i just purchased a brand new MacBook Pro directly from Apple that had MacOS Sequoia on it already. I downloaded the latest version of Firefox, and it won’t launch. I read your article about users who had firewall enabled on MacOS BEFORE upgrading to Sequoia having issues with Firefox not launching, but in my case, it’s a new system that had Sequoia on it already.

Is there any workaround to this??? I rely on Firefox so much that I can’t migrate to my brandnew MacBook after paying so much for it.