Re: I used Iceweasel, NOW Firefox... can't get the spell checker to werk (<--- :) properly. What to do?
Do you have a dictionary installed and selected?
You can see which dictionary is selected if you right-click in a text area and open the Languages submenu.
At least one dictionary should be installed and have a check mark to indicate that it is selected.
Open the "Add Dictionaries" link to install a dictionary if you do not have one.
Make sure that [X] "Check Spelling" in the right-click context menu is check-marked.
You can enable or disable spell checking globally:
Edit > Preferences > Advanced : General: Browsing: "Check my spelling as I type"