For what must be years, now, spell-check has not been working for me in Firefox. I have tried to fix it many, many times and never succeeded.
I'm using Firefox 102.6.0 ESR on Windows 10 (x64) and have the English (GB) localisation.
Under Settings → General → Language:
- it shows the language as "English (GB)"
- "English (GB)" is also the only entry listed under "Set Alternatives"
- "Check your spelling as you type" is checked and enabled.
- Under "Choose your preferred language for displaying pages", there are "English (United Kingdom) [en-gb]" and "English [en]" listed, in that order.
I have tried reinstalling Firefox.
I have tried making a new profile, resetting my profile, clearing data, everything.
I have done a lot of searching on the web and found nothing helpful.
Please help. Spell-check is really an essential feature.
(Sorry for any typos in this question because ... obvs.)