In Firefox, you can enable spell check of a Text Field by right clicking the field and selecting Spell check this field.

However, did you know how to enable spell check by default?

1. Type about:config in the address bar and hit enter.
   
2. Find the preference name layout.spellcheckDefault
3. Double click on it and change the value to 2.

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Did you know that

• the keyboard shortcut for opening a new tab is Ctrl + t, and that to undo closing a tab is Ctrl + Shift + t ?
  
  
• that double clicking empty space on the tab bar will open a new tab and middle clicking on an open tab will close it?
  
  
• that you can remove any address from the url bar drop down list by highlighting it and pressing delete key?
  
  
• that you can stop animation of GIF images by pressing ESC key?
  
  
• that you can still save images when right click context menu is disabled by dragging the image to the url bar and selecting Ctrl + s
  
  
• that you can recover accidentally deleted bookmarks by opening the Bookmarks Manager and selecting Edit -> Undo (Ctrl + z)
  
  
• that there is a smarter way to search for words than the Ctrl + F dialog that you use? Just type / followed by the search words. Search for next occurrence using Ctrl + g
  
  
• that you can see the list of installed plugins by entering about:plugins in the address bar and hitting enter?
  
  
• that you can alter any web page by entering javascript:document.body.contentEditable='true'; document.designMode='on'; void 0 into the address bar and hitting enter?
  

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Did you know

• that you can jump to your home directory from any location by simply typing
  
  cd
  
  and pressing enter?
  
  
• that you can easily create backup of a file using
  
  cp /location/filename{,.bak}
  
  
  
• That you can copy and paste text in terminal using Ctrl + Shift + C and Ctrl + Shift + V?
  
  
• That you can search for previously typed command using Ctrl + R and typing the first few letters of the command?
  
  
• That you can see a list of all commands typed into terminal using the history command and clear it using history -c ?
  
  

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