Text select and press-and-hold menu disabled in Fennec F-Droid

A few days ago I noticed that Fennec F-Droid can no longer select text on web pages, and the press-and-hold menu is disabled. I think it started with version 150.0.0, released on 26/04/26. On sites that don’t disable Reader Mode, I can select and get a right-click menu while using that mode. So it’s not a problem with my device OS, it’s definitely something that’s changed in the app. I noticed the same problem in LibreFox on Fedora Mate around the same time, with the same behaviour. No text select and disabled right-click menu, except in Reader Mode. So I strongly suspect it’s a problem with upstream Firefox version 150.0.0. What’s the best way to get this fixed in Fennec?