To get your bug fixed faster please try to answer the following questions:
Which browser, operating system and versions of those are you using?
Manjaro Linux, Waterfox Classic and Current, latest patches (2020.07.01) with the newest Memex, hoping this would solve the problem (it didn’t)
What are the steps you took that lead to the bug?
Installing Memex on a blank profile leads to these console errors. Memex is completely broken - stuck spinning animations, links not working (pioneer upgrade link), no indexing or bookmarking features, etc.
I have seen similar screenshots from other browsers and I posted on a thread about Vivaldi. I don’t think this is a vivaldi specific issue as I’ve seen similar errors from people talking about Chrome, etc. For the record I have never had issues with any other Firefox extension although others have reported them in the past. I will reach out on their Reddit form to see what they say too. This is not a Linux issue as I can confirm it works on normal firefox and this wasn’t an interaction with any plugins because it was on a blank profile. I noticed as well that there were some graphical alignment issues with the splash intro in Waterfox (button going over the images) where in Firefox that was not the case.
I have had a frustrating experience trying to get up to speed with Memex but I really support what you are doing and will be donating soon in hopes that this will be fixed soon