View source code of Chrome extensions, Firefox addons or Opera extensions (crx/nex/xpi) from the Chrome web store and elsewhere.

View the source code of any Chrome extension in the Chrome Web store without installing it.

Features:

• Button at the Chrome Web store
• Download extension as zip file
• View source
• Configurable via context menu on button: Set one-click action via "primary action on click".
• View source:
• File name/type filter
• Search in the file content (literal or regexp)
• Automatic beautification (formatting) of code
• Syntax highlighting
• Show hashes (md5, sha1, sha256, sha384, sha512) of individual files
• Image preview
• View embedded zip files
• View any zip file by URL or file chooser
• View source of platform-specific extensions (such as Chrome OS-only extensions, or NaCl for a different architecture).
• Permalink to file and search result within a zip or extension file.
• Full support for incognito mode.
• Outputs public key and extension ID to the console.

Optional features (see options page):

• View source of Opera 15+ extensions, Edge extensions, Firefox addons or Thunderbird add-ons.
• "View extension source" contextmenu item on links to Chrome extensions
• View source of Chrome extensions outside the webstore. The View source button becomes visible when you select a CRX file for download.

Source code: https://github.com/Rob--W/crxviewer Online demo: https://robwu.nl/crxviewer/ Contact: [email protected]

Change log:

• 1.2.3: Add "downloads" permission to make sure that the "Download" button always works as intended.
• 1.2.4: Add extra parameters to the CRX URL to make sure that CRX files of extensions uploaded to the Chrome Web Store after July 2014 are correctly read.
• 1.2.6: Sync options, use optionsV2, show numeric progress instead of dots, updated JSBeautifier, restore font size.
• 1.2.7: Bugfixes (viewer height, checkbox filter).
• 1.3: Support Firefox addons (also available as a Firefox addon!) Search within files Customize webstore download parameters View embedded zip files and any zip file
• 1.3.1: Use correct URL for loading extension files.
• 1.3.2: Bugfix to allow unusual extension URLs to be opened again.
• 1.4: New syntax highlighter, improved search controls, improved word wrap.
• 1.5: Calculate hashes, add link to Github project page, bugfix for case-sensitive search.
• 1.6: Improved search highlighting & also search in beautified content.
• 1.6.2: Configurable "primary action on click", open new tab next to current tab.
• 1.6.4: Support the new CRX3 Chrome extension file format (#62).
• 1.6.6: Permalink support, Firefox add-on finder.
• 1.6.7: Fix broken extension due to bug with storage access and NativeCrxBindings.
• 1.6.8: Support CRX3 file format from CWS; support some other AMO domains.
• 1.6.9: Add option to add the context menu item to more links (#69), open new tabs via context menu next to current tab.
• 1.6.10: Improve syntax highlighting (perf, highlighting of WebAssembly source), show sum of file sizes.
• 1.6.11: Add "Extension ID" row at Analysis of manifest.json, improve CRX3 public key detection, improve zip fallback detection.
• 1.6.12: Support source viewing of Edge and Thunderbird extensions, recognize CRX3 from Opera, update beautifier.
• 1.6.13: Work around Chrome bug that broke the extension button (#120).
• 1.7.0: Support new Chrome Web Store (#134), and migrate to Manifest Version 3.