I was trying to get Yomitan set up on Firefox on my phone, and everything was fine except Jitendex just won't finish installing. It gets stuck either at verifying data, or at the last phase. I tried both importing it normally, and through the zip file in the dictionary site.
I remember this taking a while on my PC too, but it did advance although slowly, but on the last phase it gets to MAX 7% and then it's stuck there for 30+ minutes so I just give up. I should have a few GB free on my phone, idk if that may be the issue.
Because of this I'm also scared to update it on my PC, one time I tried starting the process and deleting the old version was taking AGES for some reason.
by Ordinary-Dood