hi, the size of the automatic update package from firefox 66.0.2 to 66.0.4 is 5MB in size. if that's too much and you have internet access somewhere else you could download and save the full installer from https://www.mozilla.org/en-US/firefox/all/ in order to put it onto your restricted system & install it there later on.

I am disabled and live in country. there is no other internet and i am back farther than that, 57 something if i remember. as i said, i don't update, i pay for every megabyte. i have had to resort to buying a magazine in past that had disc with it for an update for software that was rendered useless, like firefox. that is not really an option now as the only place to buy said mags is 50 plus miles away one way.

I simply need the hotfix xpi to fix it without turning on studies.

Did you post from a different computer? Your Firefox shared that it is version 66.0.2 with many, many extensions enabled. (If you want to see what I see, to the right of your question, expand Question Details, then click More system details.)

Currently, there is no official fix for older versions of Firefox that couldn't run the hotfix delivered through a "study." One may be under development, we are waiting for more information on that.

yes, this computer is different, but no this one too effected... i used a manual xpi and got most of them back, but not all...

think i am just going to move to waterfox or another... i depend on these extensions for all sorts of things..

https://support.mozilla.org/en-US/questions/1258165#answer-1218833 fixed the issue for my v54.