Fóram Tacaíochta Firefox

Hi, I'm trying to clear my cache and site data (in order to update my gmail signature), and each time I clear selected sites - namely gmail which had hundreds of thousands of GB cached - it just comes back. After tyring this 4-5 times, Youtube started having hundred of thousands of GB cached too!! So now, despite managing data an clearing these repeatedly, there's more than when I started. I think I'm stuck in a loop somewhere, please help! thanks in advance

I'm using Firefox 99.0.1 on a Macbook Air Mac OS x 10.15

Sally

I noticed during a firmware download with the file extension .DAT that Firefox removed the extension. The file was not recognizable during an attempted firmware upgrade afterward. This is a new issue occurring sometime in the past several months, since last firmware update. Firefox preferences are set to download .DAT files. No other settings are listed for that file extension. I verified the issue points toward Firefox by checking the download with another web browser which completed the download with the extension.

Whenever I open the find bar while deleting the phrases and words, it shows the one word highlighted or its phrase highlighted on the find bar whenever I reopen after deleting the phrases and words. I need help for this ?