Warning: This function is deprecated. Please use runtime.getURL.

Converts a relative path within an extension's install directory to a fully-qualified URL.


  path // string



string. A path to a resource within an extension expressed relative to its install directory.

Return value

string. The fully-qualified URL to the resource.

Browser compatibility

BCD tables only load in the browser


Given a file packaged with the add-on at "beasts/frog.html", get the full URL like this:

let fullURL = browser.extension.getURL("beasts/frog.html");

// -> something like:
// moz-extension://2c127fa4-62c7-7e4f-90e5-472b45eecfdc/beasts/frog.html

Example extensions

Note: This API is based on Chromium's chrome.extension API. This documentation is derived from extension.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.