W3C Markup Validation Service

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  DomainUserAgent

  This extension changes the UserAgent sent by your browser on a per-domain base. You can set up a different UserAgent for a specific domain, but still use the default one otherwise.

  Rating: Kabuuang bilang ng mga rating: 6

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  Web Developer

  Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.

  Rating: Kabuuang bilang ng mga rating: 152

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  Tabby Extension

  Easily add BookMarks to Tabby from your preferred browser!

  Rating: Kabuuang bilang ng mga rating: 2

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  Page Edit

  Make any webpage into a content editable document and modify it via toolbar popup!

  Rating: Kabuuang bilang ng mga rating: 3

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  Internet Speed Test

  Test your internet connection speed (upload and download) from a toolbar panel

  Rating: Kabuuang bilang ng mga rating: 36