By default built-in Firefox 4 spell checker will not check the spelling in Text Boxes and Web Forms and rich Text Editors. We don’t have add or install new add-ons for spell Checking. Firefox 4 comes with this feature by default. Its just not enabled. Here is a Firefox tweak that will force Mozilla Firefox In-line Spell Checker to Work in Textboxes and Web Forms
Enable the built-in Firefox spell checker, if it is not initially working in a text box:
- “Tools -> Options -> Advanced -> General / Browsing -> Check my spelling as I type” should be checked (default setting).
- Now type layout.spell in Filter box.
- Set the layout.spellcheckDefault preference to 2 (default = 1)
- Firefox will check every textbox, Text editors and Web forms etc in webpages.