If you prefer a lightweight solution that works while you browse, several open-source browser extensions can intercept Widevine license requests and log the plaintext keys directly to your console.
Requires ADB and frida-server installed on a rooted Android device. 3. Widevine L3 Decryptor (Browser Extensions) getwvkeys alternative
Similar tools like the WVGuesserExtension-NextGen are available for both desktop and Android versions of Firefox. 4. L3-Keys (CLI and GUI) If you prefer a lightweight solution that works
It is designed specifically for getting Widevine L3 decryption keys without needing to navigate complex web APIs manually. The is often cited as the closest alternative
The is often cited as the closest alternative because it is essentially a "leaked" version of the original GetWVKeys source code. It functions identically and allows users to obtain decryption keys by providing the PSSH (Protection System Specific Header) and license URL from a streaming service.