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Multi-Line Spell Check in Firefox

Many of you already know of a neat add-on for Mozilla Firefox called Spellbound, that makes it so Firefox can spell check in multi-line text boxes, but what I didn’t know is that you can achieve this same functionality sans add-on!

It’s true, and here’s how you do it:

First, open up Firefox and type about:config in the address bar and hit Enter. You’ll get a warning screen that looks like this:


Click “I’ll be careful, I promise!”

From the list of preferences that appears, scroll down and find layout.spellcheckdefault and double-click on it.


Change the value to 2 and click OK.


Now restart Firefox and enjoy the functionality of an add-on without actually adding anything! If you ever want to go back to the default setting, just follow these steps and change the value to back to its default setting: 1.