We show you three different ways to enable or disable the spell checking feature that checks your spelling in web forms in Mozilla Firefox.
Option 1 – Basic Firefox Menu
- Select the “Menu” button located at the upper-right corner of the screen, then choose “Options“.
- Scroll to the “Language & Appearance” section.
- Select “Check my spelling as I type” if you want to turn spell checker on. Uncheck it if you wish to have it off.
Option 2 – From about:config
- Type “about:config” in the address bar.
- In the filter field type “spell“.
- Find the entry for “layout.spellcheckDefault” and double-click it.
- Set the integer to “1” to “enable”the spell checker. Set the integer to “0” to “disable“the spell checker.
Option 3 – Via prefs.js file
- Close Firefox.
- Navigate to the following location based on your operating system.
- Windows 10/7/8 – “%APPDATA%\Mozilla\Firefox“
- Unix/Linux – “~/.mozilla/Firefox“
- Mac OS X – “~/Library/Mozilla/Firefox” or “~/Library/Application Support/“
- Open the “Profiles” folder.
- Open the folder that represents the profile you would like to edit. The name of the folder will vary. It is usually a bunch of characters, followed by “.default”.
- Open the prefs.js file with a text editor like Notepad.
- Look for a line that contains “layout.spellcheckDefault“. If it doesn’t exist, add a line for it in the file and set it as desired using these examples:
- user_pref(“layout.spellcheckDefault“, 1); = Spell Check enabled
- user_pref(“layout.spellcheckDefault“, 0); = Spell Check disabled