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![]() Content Scripts – on presented example we have jquery-1.8.1 and content.js as content scripts So as long the URL matches the settings in the extension, the browser will load up the content script. Is a regular expression which defines on which website the extension or the content script going run. ![]() Manifest files are just a simple JSON file, containing the name of the extension, description, permissions and one of more important sections is “content_scripts” ![]() Manifest File –similar like most mobile applications, this file lists all the components embedded and defined by the application permissions. We can install the extensions more or less from the Chrome Web Store, also we can install them from some 3rd party websites or just manually by dragging the extension CRX file intothe chrome extensions page and hit the install option.Įxtensions have a few distinct components: Knowing this I figured why the extensions are so popular, we should take a closer look and try to avoid the bad things extensions can bring.īasically they are a bunch of files (HTML + JS + CSS ), zipped and signed with a developer key, (just like a usual mobile application) packaged into a CRX file. They can even change your proxy settings, block requests that your browser is trying to send over HTTP or HTTP, can take screenshots of websites and so on. For example, in theory, extensions can read and write all the cookies so they are a good to start a hijacking attack. Google chrome extensions are basically HTML applications, so they suffer for the same vulnerabilities as usual websites but the difference between extensions and websites is the fact that an extension requires higher level access privileges. Why are they so interesting as a subject of research? By installing these extensions, you give your browser additional functionality (mail notification, ad blocking, online bookmarking, developer tools, page recommendation, notebooks, and so on).ģ. Firstly chrome extensions are NOT browser plugins, they are browser add-ons, HTML5 applications that enrich the browser’s user experience.
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