You cannot take the drive out of the old Mac and put it in the new Mac to get the data?

Thanks I do have the old hard drive that can be plugged into my new mac. (Need a case for it first and Apple said may not be able to do it). I was hoping the bookmarks might be saved somewhere through Firefox.

Hi

Thank you for your question about the Firefox Sync service.

It appears from your question, that you are using Firefox Sync as a back up service. This is not what Sync is designed to do. The Firefox Sync service takes a copy of the data you wish to include and transfers it to a second device (typically a mobile device such as a tablet or a telephone) running a copy of Firefox. The storage in between all attached devices is both temporary and fragile and is not stable enough to be (and is not designed as) a reliable backup service.

If you have a copy of your Firefox profile for desktop Firefox, you may be able to recover your bookmarks and other data. Please have a read of this article.

If you have a copy of your data on a mobile version of Firefox, please follow these instructions to connect it to Firefox Sync to copy your data.

Thanks I do have the old hard drive that can be plugged into my new mac. (Need a case for it first and Apple said may not be able to do it). I was hoping the bookmarks might be saved somewhere through Firefox.

Case is good, but I would run it from the new laptop first.

Thank you, I followed instructions to see if i have a second Firefox profile. I do but when I launched it, I still could not retrieve old bookmarks.