i made a habit on the following simple 2-action failsafe
before you press "post" button press CTRL+A (select all) and CTRL+C (copy all the selected) -> its in the clipboard
if browser / website / whatever fails, press CRTL+V (paste from clipboard)
this is good enough for like 99.9% of forum activity
on "Important" documents use a notepad and press CTRL+S (save) regularly so even if power goes out your text will be save since its stored on the harddrive instead of the RAM
- once finished ctrl a / ctrl v in browser
this way you are not dependent on 3rd parties autosavescripts