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Extensions 
Chrome
Web store Download Extra Headers chrome extension. Enables adding or modifying HTTP request header and install in your Google chrome browser. This is Direct Extra Headers Crx download for Chrome it is also called Extra Headers offline CRX for chrome Download. This Extra Headers is used to Enables adding or modifying HTTP request header
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Add diagnostic headers to Akamai'd websites
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Adds a header for dev websites.
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Make the current pages sticky headers disappear
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Loads all http headers, cookies and Akamai response headers (http/https)
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Displays the current tab’s HTTP request and response or a Live HTTP Headers tab showing a stream of requests and responses.
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Disables CSP headers
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Chrome extension that allows the inspection of security aspects of a site's HTTP headers, cookies and other key security settings.
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Unsticks the sticky or fixed-position headers that make it harder to read certain sites. Currently only works for the New Yorker.
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Add, remove, or modify HTTP Headers for any request based on a regular expression
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Alter your HTTP request headers on the fly