Firefox Community Forum

I need to udate my current version of Firefox, however, my MAC is so old that it wont run the most currnet version of Firefox. Can anyone tell me which version will run on my MAC Sierra version 10.12.6 Thank you.

I have downloaded Firefox ESR and think it has been installed on my masOS version 10.12.1 and am wondering if I can use it on this version after reading your warning about support. Perhaps I have not installed it properly as I have just used what I think was the previous version since it has all the oldsaved sites.