Making an Addon for Twitter


I would like to write a Firefox (and Google Chrome also if possible) extension/addon for Twitter that would show a user different information on an account following list, such as the number of accounts of that list the user follows too, how many they have blocked, and how many follow the user.

However, I never wrote a single extension and I don’t even know if it’s possible to do it.

Can I have some help with where to begin and how to write it, please?

Thank you in advance.

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here is a list of sample extensions, what they do and what APIs they use

Here is the repo

Here is how you load them temporarily and debug them and browser compat (yes, you can have one codebase for ff and Chrome) Build it for FF, add webextension-polyfill to Chrome and it should just work.

Have fun!