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CloseWelcome to فایرفاکس Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Live HTTP Headers by Dougie
Rated 5 out of 5 stars
Incredibly useful if you're wondering what response codes are being sent by a web server. You can see them in real-time. Useful for making sure you're own sites are working correctly.
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