firefox is not displaying all characters on a page. Then, the missing characters suddenly get filled in. I have disabled all extensions thinking that is the probable problem, and it seems to work short term. But then it start up again. Have to reload a page, and sometimes THAT doesn't even work. Yesterday, I removed and reinstalled firefox. It was OK for about 1 hour, but now the problem is back. It only seems to be firefox (default browser). Now, hope this helps. I just got an email (Thunderbird) with no content except for a black block then appears and disappears. Have you ever heard of these things happening? P.S. As I type this, characters are starting to disappear....Oh! There back now. Chrome does not seem to have this issue, but I rarely us it (browser of last resort). Microsoft edge browser started intruding about 3 months ago. Comes up as my default browser? (I do not load it ever!). Things are getting really screwy. Hope you can help. P.S.S. as I get ready to send this to you, about 25% of what I have typed is no longer showing.