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Spell checker doesn't work.

  • 4 replies
  • 19 have this problem
  • Last reply by Tolqua

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New PC. Installed Firefox. Spell check does not work. 'Check spelling as you type' is enabled in settings. US English language pack installed. Spell check does not work.

What am I missing?


All Replies (4)

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Note that a language pack only includes translations of strings in the user interface and doesn't include a dictionary.

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 -> Advanced: General: Browsing: "Check my spelling as I type"

You can look here for dictionaries:

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Installing the language pack and dictionary fixed the problem for me, but I think the language was already installed (isn't this part of the install?). Seems strange to build in the spell-check functionality without including the dictionary necessary for it to work.


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A lot of dictionaries have a specific license that prevents Mozilla from including the dictionary as part of the installation. In such cases you will have to install the dictionary yourself.

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Thanks for the explanation, cor-el.