When you are building a chrome extension, you may need to authenticate the user with a third party service. If the third party service is google itself, it’s relatively easy as you can use google cloud platform plus firebase to authenticate the user. However if you are using other third party service, it’s a bit tricky and there are very few resources available online. I recently built a chrome extension that needs to authenticate the user with Notion and I would like to share my experience here.

I use several browser extensions in my daily work. One of the most useful one is youtube-playback-speed-co it is so simple yet so powerful and saved me a lot of time on adjusting the playback speed of youtube videos. Then I wonder how it works and if I can make one myself. So I did some research and here is what I found.