I updated to Firefox 6.0.2, and then Spellcheck seemed to have stopped working. I have Spellcheck enabled in Settings, but Spellcheck still doesn't work. Any ideas? Thank you!
Do you have a dictionary installed and selected?
You can enable or disable spell checking globally:
You can look here for dictionaries:
If you are using a dictionary extension make sure it is up to date version as you may be using a older version that was compatible with older Firefox versions at time.