Same steps for nos2x https://github.com/fiatjaf/nos2x, download the extension folder from GitHub, and do same steps as above to install.
Yes, go [github](https://github.com/getAlby/lightning-browser-extension/releases/tag/v1.24.0), download .zip file for alby-chrome, extract contents to a folder, open ungoogled-chromium, go to extensions, enable developer mode, load unpacked and select your Alby folder. It’ll install the extension.
Discussion
Also I recommend that you read this https://ungoogled-software.github.io/ungoogled-chromium-wiki/faq#:~:text=Open%20chrome%3A%2F%2Fextensions%20.,drop%20the%20file%20to%20install