Board Thread:New Features/@comment-79.72.181.15-20201015191920/@comment-9605025-20201018005522

There is a lot of code that goes into making the system work. I doubt even Fandom staff could give you an exact browser version number. All they can do is investigate reported issues and fix them if the issue impacts browsers that are "recent enough" in their opinion. In some cases, these fixes may also work for older browsers but in other cases they may not.

Firefox 52 came out between Edge 14 and Edge 15. I don't have those versions of Edge but I do have the latest version of the legacy Edge (i.e. before Microsoft changed it to use Chromium). UCP appears to work on legacy Edge so there is a chance that it might work with Firefox 52. However, that browser is "old" by internet standards so, if it does work with the wiki, it may not for too much longer.