The polyfill is imported into the background script and content scripts, abstracting the namespace and asynchronous differences.
The manifest.json file acts as the configuration blueprint. The transition from Manifest V2 (MV2) to Manifest V3 (MV3) has introduced significant friction. convert chrome extension to firefox
Historically, Chrome extensions relied on callbacks for asynchronous operations, whereas Firefox adopted Promises. The polyfill is imported into the background script
A web-based utility where developers can upload Chrome extension files to check for required modifications, particularly for Manifest V3. convert chrome extension to firefox
// Or use Mozilla's webextension-polyfill // npm install webextension-polyfill import browser from 'webextension-polyfill';
A Methodological Framework for Porting Google Chrome Extensions to Mozilla Firefox: API Compatibility and Manifest V3 Considerations
This library wraps the browser API to provide a cross-browser compatible layer. It accomplishes two main tasks: