This just made my life so much easier, thanks for posting this. IT Glue recently introduced a bug they have acknowledged where you can no longer hover over large images to see the full size, making half of our documentation illegible unless you want to force open the image in a new tab. This fixes that entirely.
I may as well post my must have extensions while thanking you:
DarkReader - this combined with f.lux on the machine will save your eyesight
SponsorBlock - makes youtube so much more usable, as well as other video sites
CookieNoticeBlocker - Im guessing there is a way to use ublock to achieve similar results, but it blocks those annoying popups for you
Behind the Overlay- useful for sites that use an overlay to hide article content, click the button and it hides any overlays and suddenly the page is there again
UnPayWall - find the full text to scholarly articles
I have some browser profiles for testing out extensions which have broad permissions and I don't really trust them. I don't have them on my main surfing profile for security & privacy reasons. If some of them are malicious, they get very little data.
Kill Sticky, it it lets you kill all sticky elements with a keyboard shortcut (Alt+K on Windows/Linux, Cmd+K on Mac). Super useful for "sign-up to read" types of popups.
I used to use a firefox extension that showed the number of open tabs in the corner, as I found firefox would sometimes go wrong and loose everything I had open when I got to about four thousand open tabs.
I didn't get around to reinstalling it after a fresh install.
When you hover your cursor over an image it opens over your cursor and you can enlarge it
Can't live without now