Firefox won't save my Yahoo mail passwords, but Explorer will.

Question

Firefox used to save passwords for yahoo Mail, but lately does not seem to be working. I have 2 mail accounts and passwords with Yahoo. I have read through and clicked all the things about allowing passwords to be saved but nothing is working. I do not have this problem with Explorer. If this is just something that Yahoo has done to shut out Firefox then so be it, but if there is something that can be done I would appreciate the help.
I read through other Q&A's on this, looks like a big problem all over, but many of the so-called solutions about bookmarks, etc I can't understand what to do. Many say "solved" but I do not see any solution.
_{remmed out my initial temporary comment}
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Comment from another interested user ~J99 <br />
I do not know the answer, I asked on a Yahoo forum last week. I did try a bookmarklet. I did see another computer able to save passwords. Neither were my computers and the computers used GoogleChrome. I suspect Yahoo may have upped security at some stage. I do not have a Yahoo account myself. I also noted GoogleChrome does not use a master password so all passwords are visible.
I comment as an edit because an unanswerd question will get a faster solution. I will move this to a separate answer once someone else answers.
John
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Answer 1

I initially commented
_{Comment from another interested user ~J99}
_{I do not know the answer, I asked on a Yahoo forum last week. I did try a bookmarklet. I did see another computer able to save passwords. Neither were my computers and the computers used GoogleChrome. I suspect Yahoo may have upped security at some stage. I do not have a Yahoo account myself. I also noted GoogleChrome does not use a master password so all passwords are visible.}
_{I comment as an edit because an unanswerd question will get a faster solution. I will move this to a separate answer once someone else answers. <br /> John}
Now moving the comment to an ordinary post.
I guess in fact it may be Google Chrome that blocks the bookmarklet action. Not Yahoo.