Chrome //
Extensions 
Chrome
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Download HTTP alert chrome extension. Adds an interstitial alert before visiting HTTP (insecure) sites. and install in your Google chrome browser. This is Direct HTTP alert Crx download for Chrome it is also called HTTP alert offline CRX for chrome Download. This HTTP alert is used to Adds an interstitial alert before visiting HTTP (insecure) sites.
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Alert if web site is down.
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HAR Viewer is a app that allows to visualize HTTP tracing logs based on HTTP Archive format (HAR).
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Displays the live log with the http requests headers
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PostWoman is a plug for testing RESTful web services, like postman.
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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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A tool about replay XHR
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Makes HTTP pages conspicuous.
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Quickly view HTTP headers for the current page.
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KeePass integration for browsers using KeePassHttp
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Displays the live log with the http requests headers