How to edit Dictionary in Firefox?

[Grr]

I want to edit Dictionary in Firefox for 2 words, which mistakenly I added to dictionary.

Question: how to accomplish it?

[Ashwin]

Follow the steps given at this lifehacker article

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Note from another website

Note that “persdict.dat” will not be found in the above mentioned locations, unless you added custom words to the the dictionary. You can add a custom word marked as a typo to the dictionary by simply right-clicking and choosing – you guessed it – “Add to Dictionary” from the context menu.