Hello,

Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies do the following:

1. (Firefox 57 and above) Click the Library button and choose History.
   (Click the menu button and choose History in older Firefox versions.)
2. In the History menu, choose "Clear Recent History...".
3. Under "Time range to clear", select "Everything".
4. Now, click the arrow next to Details to toggle the Details list active.
5. From the details list, check Cache and Cookies and uncheck everything else.
6. Now click the "Clear Now" button.

Further information can be found in the Delete browsing, search and download history on Firefox article.

Did this fix your problems? Please report back to us!

Thank you.

Sadly, no impact. I still face a 30-90 second wait for Google sheets to load (on a 77 Mbps down / 16 Mbps up fibre connection). Sheets in Chrome are still fine.

I would recommend at this time this is probably a Google IP control settings and it's probably best to use Chrome for anything Google related.

I have this problem as well. Rather than push people off to another browser, is Mozilla going to try and address this issue, since the workarounds don't work to fix it? It has to either be something Google did - or something FireFox did with the most recent update. I'm on version 69.0 of FireFox, and only started seeing it the 1st week of September 2019 here...