what do you mean the spell checker doesn't work? Is it turned on?

per cor-el:

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 sub menu. 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.

The spelling checker is enabled if [X] "Check Spelling" in the right-click context menu has a checkmark.

You can enable or disable spell checking globally:

• Options/Preferences -> General: Browsing: "Check my spelling as I type"

You can look here for dictionaries:

• https://addons.mozilla.org/firefox/language-tools/

Make sure you install a dictionary and not a language pack.

You can check the spellchecker.dictionary pref on the about:config page. There might be problems when the name has an underscore and not a hyphen (en_us versus en-us).

Otherwise, I'm doing some digging to see how you can easily distribute the add on to all networked computers easily. If you can add addons all at once, this might be useful https://addons.mozilla.org/en-CA/firefox/addon/us-english-dictionary/

Thanks for the swift reply evhenry, but the question was more about deploying the dictionary to 500 networked computers than about the spellchecker not working. :)

I cannot find anything in the documentation to assist bin this, but maybe I am looking in the wrong place!

Does this work if you use GPO or policies.json to install the dictionary extension ? See 'Extensions':

• https://github.com/mozilla/policy-templates/blob/master/README.md

Were you able to try deploying with policies?