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Tolerim
15 days ago

How do I run a browser extension within the about:config domain?

As I work on a browser extension, my goal is to run a script once the Firefox settings are opened. Despite my attempts to include about:config in the match property of my manifest.json file and researching online, I have yet to find a solution. Currently, my code includes manifest.json and main.js files. The contentscripts property is set to include a match for about:preferences and call main.js. Despite the fact that this code functions when using the match value <allurls>, it does not run when using about:preferences.
Answers(1)
avatar
Tolerim
15 days ago
Verified Answer
Unfortunately, it is not possible to run a script on certain browser settings pages like about:addons or about:preferences using a browser extension. This is because these pages have been intentionally designed to resist external scripts. The only way to modify the behavior of these pages is through built-in Firefox APIs. In this specific case, if you want to create an extension to interact with the settings page, you need to use the Firefox browser.settings namespace provided by the mozilla API. Here's an example of how this could work: 
browser.settings.onOpen(function() {
  alert("The test extension is up and running.");
});
This code defines a listener for the browser.settings.onOpen event, which is emitted when the user opens a settings page. Once the event is received, the listener executes our custom code (displaying an alert message). To use the browser.settings namespace in your extension, you will need to add "mozillaAddons" to the permissions array in your manifest.json file.
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