I use the non-WE version on Fx 52.9 ESR for a long time and it is great and a NECESSARY extension for anyone with a wide screen (24") monitor to control gigantic text that claims to be at 100% on many websites which apparently do not code for wide screen monitors. I zoom down to 67% on most websites. I need an extension that will remember my settings for each website and this extension (both non-WE and WE) does a fine job.

I have the WE version 11.4 on Basilisk 2018/07/18 (64bit) and I had a similar problem to HIPUNK's in that I would recently get a popup from Zoom Page whenever starting Basilisk. It said I needed to change a setting in about:config which, like HIPUNK, I had done ages ago. This notice would appear right above the systray as Basilisk was loading. I could NOT click it away!! Closing Basilisk did not remove the notice. Restarting Basilisk did not help. Rebooting the computer (Windows 10 1709-16299.522) did not help as I was now getting that popup from this extension ON BOOT of the computer! ONLY a complete shutdown of the computer (this is a desktop on 24/7) and a later cold boot would remove that message.

I came here in desperation because I cannot be without this extension and I like the WE version which has worked fine on Basilisk until a few weeks ago. I tried your suggestion to HIPUNK and it works!!! I did your suggestion yesterday so I can't be sure it will continue to work but so far, I have not had any popup, that I can't dismiss, about a setting for this extension that I fixed in about:config long ago. So, I will give you 4 stars and 5 later if this fix continues to work.