FYI, when a website erases your text that you just spent an hour writing, you can use this little trick to recover it 99% of the time:

1. find the firefox pid

$ pgrep -l firefox

2. attach gdb to firefox and dump its core

$ sudo gdb <pid>
gcore firefox.dump
<this takes awhile>
quit
<firefox dies>

3. find your lost text in the coredump

$ strings firefox.dump | grep "a unique word/sentence from ur text"

i just did this today to recover a long post i wrote, and figured i'd show others!!