Sometimes it would be useful to avoid downloading the same file again and again, this add-on is here to help. Dupe Checker allows users to compare text highlighted on the screen with directories and/or files on the computer. It is designed to let you get to these specific files and directories without having to leave Firefox. 
If you find it useful for you get it here.
1 comment:
Nice post - comparing files right in FireFox, I'm going to tell about this is our diff utils blog.
Thank you!
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