Adds a button to right of the address bar when a Firefox add-on or Chrome extension is detected. This also includes extensions for the Opera and Edge browsers and Thunderbird. This button shows two options: - Download extension as zip file - View source The default action (showing the above options) can be changed via the "Primary action on click" menu that appears when you right-click on the extension button. It also adds a context menu item on Firefox and Chrome extension links. The "View source" option opens a new tab with a simple viewer, with the following features: - Download-as-zip and download-as-crx at the upper-right corner. - List of file names, and the option to filter files with a regular expression. - Find files containing a string, or with content matching a regular expression. - Quickly jump between search results, or from/to a specific line. - Automatic beautification (formatting) of code - Syntax highlighting - Image preview - Show hashes (md5, sha1, sha256, sha384, sha512) of the file content. - View content of embedded zip files. - Download Chrome Web Store extensions for a different platform (e.g. Chrome OS or NaCl). - View the contents of any URL or zip file. - Get permalink to file and search result within a zip or extension file. Also known as: crxviewer and CRX Viewer.