since installing Firefox i can not get my mail on my kindle fire. it tries to load it, but tells me my secession is over and i must sign in again
This issue can be caused by corrupted cookies or cookies that are blocked.
Clear the cache and cookies only from websites that cause problems.
"Clear the Cache":
"Remove Cookies" from sites causing problems:
You may also have to enable third-party cookies, possibly only for visited websites.
To see all History and Cookie settings, choose: