Seriously nifty add-on. Screen Zoom
 

One of the many sudden problems I've had with FF in the last itterations is the zoom keeps going back to say, Ctl 0 set. I've found a fix for what used not to be a problem, but it's very handy as it fixes a zoom for all regular sites.

https://addons.mozilla.org/en-US/fir...ullzoom-level/

Tiny space on the main toolbar that also displays the zoom %

Although not a answer to your post. Using a mouse Ctrl and clicking the mouse wheel forward (XP-W7) increases the page size.

Yes, and it was still the same next time you visited the site. W10, it wasn't . . . or at least, after my 'disturbances' it wasn't. It could well be that if I'd done a total reload it would have gone back to normal, but I can't see this would have been invented if there wasn't a problem.

I want it to work, but there's a problem. When I use Ccleaner - about ten times a day while I'm messing with W10 - it resets every page to 100%

I can't find a cookie that does it. Anyone any idea how this is reset? Other than that, it's a smashing tool.

Doh! There right in front of my eyes. Yes there's a setting and not a cookie.