Extension source viewer
View source code of Firefox add-ons and Chrome extensions (crx/nex/xpi) from addons.mozilla.org, the Chrome Webstore and elsewhere, with CRX Viewer (crxviewer).
What is Extension source viewer?
Stats
Chrome-Stats Rank
Summary
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.
User reviews
User reviews summary
Pros
- Allows inspection of add-on code before installation.
- Increases transparency by showing what services an add-on may be calling.
- Useful for verifying whether an addon is potentially malicious.
- Handy and practical for use with Firefox.
Cons
- Does not work properly with Waterfox Classic.
- Some users experience issues with the CRX icon not appearing.
- Installation issues, requiring the old version to be uninstalled before updating.
Most mentioned
- Useful for reviewing add-on code
- Certain compatibility issues with Waterfox Classic
- Must sometimes reinstall to update correctly
Recent reviews
Safety
Risk impact
Extension source viewer is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Extension source viewer if you trust the publisher.
Risk likelihood
Extension source viewer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.