When I open a Google Docs document anonymously from my desktop computer (Windows 7 + Firefox esr 52), I always get this enormous green disk at the bottom right:
Clicking on it has no effect, except for the smaller white "Explore" button inside. Clicking on that white "Explorer" button opens the pivot table tool.
How can I get rid of that disk so that it won't reappear in the future when I browse Google Docs anonymously?
I guess it has something to do with the "Explorer" feature, but whoever thought it would be a good idea to make it take a sixth of my total screen space must have been high at the time.
[Edits]:
By "anonymously", I mean "not logged into my Google account", not "using the Private Browsing feature of Firefox".
Rubén's answer implies that it could be done by upgrading Firefox. So I should add that I don't want to upgrade Firefox. Maybe something about cookies keeping my preferences while browsing Google Docs without being logged in Google?
Best Answer
It's very likely that the problem occurs due to a missing feature/incompatibility of Firefox esr 52.
From System requirements and browsers (emphasis mine)