Manifest V3

[mgueury]

Make the extension compatible with Manifest V3.

https://developer.chrome.com/docs/extensions/mv3/intro/mv3-migration/

Challenges that I noticed:

• there is one single background js file
• change of background_actions to action
• Eval seems to be not allowed on String. This could be very annoying with Emscripten. (maybe -s NO_DYNAMIC_EXECUTION=1 could help ?)
• Service workers...

[esabol]

Thank you for your continued support. :)

[MarcGueury]

Note:

• see EMSDK support for chrome extension manifest version v3 emscripten-core/emscripten#16969
• "" We have been compiling using these emsdk flags - WASM = 1, MODULARIZE =1, EXPORT_ALL = 1, EXPORT_NAME = 'library', DYNAMIC_EXECUTION=0 ""
• Since I have no HTTP fetch, this could be enough,