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Extensions 
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Download Whois® DNS lookup chrome extension. Do a DNS lookup on A,AAAA, MX,NS,TXT,SOA and SPF records and install in your Google chrome browser. This is Direct Whois® DNS lookup Crx download for Chrome it is also called Whois® DNS lookup offline CRX for chrome Download. This Whois® DNS lookup is used to Do a DNS lookup on A,AAAA, MX,NS,TXT,SOA and SPF records
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SEOquake is a free plugin that provides you with 'key' SEO metrics, along with other useful tools such as SEO Audit and many others
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Makes JSON easy to read. Open source.
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Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies
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Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
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Clear your cache and browsing data with a single click of a button.
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Spoofs & Mimics User-Agent strings.
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Capture a screenshot of your current page in entirety and reliably—without requesting any extra permissions!
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Simple yet powerful Cookie Editor that allow you to quickly create, edit and delete cookies without leaving your tab.
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Instant website analysis, including site rank, site traffic, sources and geography.
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The Tag Assistant Companion extension works with Tag Assistant to help troubleshoot installation of gtag.js and Google Tag Manager.
