YT-to-Spot is a firefox extension that takes in the url of a music video hosted on Youtube and opens a new tab containing the link to the same song hosted on Spotify. This is a surprising common task for me, and I wanted to automate this process to make a bit painless. This uses the Spotify API and Youtube API to get the title of the youtube video and search it on Spotify API.
Clone the directory with git clone github.com/sooraj-srini/yt-to-spot.
Open the .xpi file stored and simply drag it to about:addons. The extension should work out of the box.
Note that the API calls are made from my account currently. OAuth2.0 is a bit tricky.
Once it's done, a popup should be present on your extensions list. Iff the url is a valid youtube url and the spotify search works, the extension will open up a new tab with the url of the song hosted on Spotify.