Support Firefox

[Christian Paul]

I am starting Chrome just for Giphub. Support for Firefox would help me a lot.

https://developer.mozilla.org/en-US/Add-ons/WebExtensions

(Simplified) Steps

• Use browser instead of chrome global
  • 🚨 some functions might work differently as they got standardized
• Have a manifest for Firefox
• Have a building process for Chrome and Firefox (unify where possible; separate where necessary)

[Christian Paul]

I have a working firefox branch now.
Might take some time to get one extension working and tested in both Chrome, Firefox and other webextension-compatible browsers.

[Sean Everest]

https://addons.mozilla.org/en-US/firefox/addon/giphubv1/