I built a similar extension for Netflix, Amazon Prime Video, and Shudder. I'm also pulling and rendering RT and Metacritic scores (when they're available). I didn't release it, I just install it locally on the devices that I frequently stream from and have it collecting dust on my GitHub.

Interestingly, I recall when hacking it together that there are quite a bit of discrepancies between the services and the release years they use for videos. One service will say that Movie A was released in 1989 but IMDB will have it listed as 1990. Release years matter for titles where there might be little or no variation between an original film, remakes, or sequels.