Forum zhromadźenstwa Firefox

Whenever I open up PDFs within the Firefox browser, they have a black background and the text and images do not appear. I can copy the text and images out of the pdf and into a word document and it works out fine. Also opening it up on other applications works out fine. Attached is what happens when I open up a known working pdf in Firefox. The browser version is the current version, 135.0.

Every time I try to view a pdf file on Firefox I can view the file but in the lower right 1/4 of the screen I get a graphic of a page with shaded areas representing lines with writing on them. There is a type of pen cursor moving along the line.

This happens with different pdfs - from the internet and from my saved files. This doesn't happen on another computer with Firefox.

I've deleted and redownloaded Firefox an number of times, also tried troubleshoot mode - no improvement. Virus scanned, restarted a number of times.

Pdfs work on edge and chrome and reader with no problem.

I have a screenshot.

Any Ideas? Thanks

Recently, whenever I open saved (or sometimes new web) documents in Firefox, a very large pop-up on the lower right side of my screen appears with a cartoon of a pencil scanning a document. Below the cartoon it states "Now you can highlight your PDFs! With our new highlighter tool, you can read and edit PDFs in one place." The pop-up blocks half the view of the document and cannot be minimized or closed. It also prevents accessing (it hides) the "print" option if I want to print/save the page. I have WINDOWS 11 and have looked online for solutions to this problem which always produces the same suggestion: "go to 'settings', click 'privacy & security', check 'block pop-ups', click 'OK'", all of which I've done. I now limit my use of Firefox to streaming videos via amazon, and use Chrome or Edge for anything else I need to do, but I assume Firefox would not be happy to know of the aggravation their browser is causing, forcing users to go elsewhere (or am I the only person having this problem). Thank you in advance for any new suggestions.