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Extension source viewer by Rob W
View source code of Firefox add-ons and Chrome extensions (crx/nex/xpi) from addons.mozilla.org, the Chrome Webstore and elsewhere.
Extension Metadata


Adds a button to right of the address bar when a Firefox add-on or Chrome extension is detected.
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.
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.
Report this add-on for abuse
If you think this add-on violates Mozilla's add-on policies or has security or privacy issues, please report these issues to Mozilla using this form.
Please don't use this form to report bugs or request add-on features; this report will be sent to Mozilla and not to the add-on developer.
This add-on needs to:
- Download files and read and modify the browser’s download history
- Access browser tabs
- Access your data for all websites
- Add-on Links
- Version
- 1.6.11
- Size
- 235.51 KB
- Last updated
- a year ago (Aug 10, 2019)
- License
- Mozilla Public License, version 2.0
- Version History
- Add "Extension ID" row to Analysis of "manifest.json" (#82).
- Select correct public key of CRX3 files (#83).
- Add pager to AMO search results (#79).
- Support viewing XPIs on AMO that require a session.
- Fix access to addons.mozilla.org when cookies are needed.
- Try harder to detect zip files (#86).
- Select correct public key of CRX3 files (#83).
- Add pager to AMO search results (#79).
- Support viewing XPIs on AMO that require a session.
- Fix access to addons.mozilla.org when cookies are needed.
- Try harder to detect zip files (#86).
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