Port this to Edge & Mozilla Firefox

[nazmulidris]

Try and port this extension to both Edge and Firefox and publish this in their respective app stores.

• https://github.com/mozilla/webextension-polyfill
• https://stackoverflow.com/questions/45985198/the-best-practice-to-detect-whether-a-browser-extension-is-running-on-chrome-or
  • "You might want to mention that Firefox natively supports using the chrome.* namespace and callbacks. Thus, the easiest code-compatibility between Chrome and Firefox is to just use chrome.* in both. You only need to use the browser.* polyfill if really want to use Promises."

Related issues:

• Create comprehensive tests to check the logic of the entire extension #32

[superbahbi]

@nazmulidris I've looked into this and found that we can port Edge directly without any changes, except for the chrome.storage API alteration. As for Firefox, it's compatible, but we need to modify the manifest.json
https://extensionworkshop.com/documentation/develop/porting-a-google-chrome-extension/

[nazmulidris]

@superbahbi That is great news. The latest changes in the main branch have support for abstracting the storage api implementation away, so we are no longer tied to chrome. It also opens the doors to doing proper testing for all the storage related files.