Strange problem with images
First symptom: Lately, when I use Firefox on my desktop to attach a JPG or PNG screenshot to an online post, it shows up only as a black square. (The image looks normal w… (مزید پڑھیں)
First symptom: Lately, when I use Firefox on my desktop to attach a JPG or PNG screenshot to an online post, it shows up only as a black square. (The image looks normal while I'm creating the post, but it won't post - which I've confirmed by checking my feed on a different device.) This doesn't happen when I use the same version of Firefox (the latest one), also running Windows 10, on my laptop. It has nothing to do with the screenshot itself - the specific file or the file type; the same thing happens with anything I try to attach.
Second symptom: When I create a PDF with Firefox and then try to print it, a large rectangular portion at the top is blanked out, as if someone had placed a sheet of paper on top of it. This doesn't happen when I use Chrome to open and print the same document on the same computer.
My guess is that I've somehow changed one of the graphics or image settings in about:config, but I have no idea which one.
Any ideas would be greatly appreciated.