[coldsauce]

There's standardization work being done at the moment with the W3C WebExtensions Community Group [1] which is definitely a step in the right direction!

Mozilla has also done some great work building a web extension polyfill library that attempts to abstract away the differences between the browsers [2] but the translation will always be imperfect, and edge cases are abundant.

[1]: https://www.w3.org/community/webextensions/

[2]: https://github.com/mozilla/webextension-polyfill