I’ve been trying to diagnose whats been causing this odd issue for the last several days now. After fiddling with a whole bunch of different things for a while, finally getting some help, eventually I found out uBlock Origin is the cause.
uBlock Origin is blocking all images on the internet that are loaded when I click them via discord. If I click a direct image URL via the discord desktop app, or discord web app, the web page in firefox loads nothing, just white nothingness. Tests shown that the image was delivered to my PC and that I received the image, but the browser was just showing me nothing. This happens to any website at all. For the sake of giving examples, this is the current image failing to load;
https://cdn.discordapp.com/attachments/201994927662432256/353052414489788416/unknown.png
The others which now load because I loaded them after disabling the entire addon,
http://i.imgur.com/tmEB1Ri.jpg
http://i.imgur.com/x1s4k2A.jpg
Actually they no longer load either, all this diagnostic stuff and reinstalling ublock from scratch seems to have broken it even worse now.
I’ve disabled all filters, I’ve “turned off” ublock, and still doesn’t work, but if I disable the addon entirely, images begin loading properly. This seems to have started happening after the firefox update to 55.0.3 - 64bit but I can’t be entirely sure. No new addons have been added, nothing else has been changed. I am unable to do any more to diagnose this issue. I know its uBlock, I just don’t know why.
EDIT:
It seems to actually be an interaction between Grease Monkey, two of the scripts my greasemonkey had enabled: KeepVid Helper and Anti-Adblock Killer | Reek.
I’ve disabled the scripts for now and things seem to be workng normally again… I’ve no idea why this sudden interaction happened but I’ll go ahead and leave my post here.