As per [https://www.reddit.com/r/firefox/comments/1egjd0s/google_docs_acting_weird/ this reddit thread]. When a document is loaded in Google Drive, after a few minutes pages will begin to flicker through other pages in that document (including edited version of the current page) and sometimes even pages from other documents that have been opened that session (some people reported pages from documents opened in previous sessions appearing, but I have not had that issue). This problem ''seems'' to only affect Linux. Reports on the reddit thread indicate that setting '''gfx.canvas.acceleration''' to false fixes the problem, although I have not thoroughly tested to ensure that fix works and even if it does it obviously isn't a desirable solution. The thread indicates that this has been an issue since 129.0.2, although I'm unsure whether this is a regression or if Google changed something that broke Gecko. Interestingly, turning off all of my extensions doesn't seem to fix anything, but running in troubleshooting mode does. Additionally, I've noticed that Firefox reports that it is running in Quirks mode when it loads a particular script, presumably because that script injects raw HTML into the page. (the script in question: https://docs.google.com/static/document/client/js/108419787-client_js_prod_kix_core.js)