Firefox Inline Spell Checker

Firefox includes a built in spell checker that can check for spelling errors. However, by default the spell checking feature only checks for multiline fields, which does no good if your typing a single line entry into a single line entry box. In the following simple solution, I’ll cover the process of tweaking the firefox spelling checker to allow you to detect spelling errors and mistyped words as you type them in single line entry fields.

Firefox Inline Spell checking example

How to make firefox spellchecker check for spelling errors inline

1. Open a firefox window
2. Type about:config into the address bar and press enter:

3. Accept the warning to continue
   
4. On the next page (1) type the layout.spellcheckDefault in the filter field (2) Double click the integer value 1 (3) Enter an integer value of 2 (4) Click OK to accept the new setting:

That’s all there is to it. Next time you run Firefox and begin typing into a single line form field (or multiline) spell checker will check your spelling for mistypings as you type.

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