example / notes taken while going through https://hacks.mozilla.org/2015/09/lets_write_a_webextension/
create manifest.json file
build .xpi file (extention files are plain zip files, with xpi extention)
to install, enable unsigned in firefox settings by setting xpinstall.signatures.required to false (reference)
need tabs permission to read tabs
can set icons using:
"icons": { "48": "icon.png", "128": "icon128.png" }
"default_icon": { "19": "button.png", "38": "button38.png" }
from https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Your_first_WebExtension
content_scripts can be loaded into urls that match a pattern. simple js file that is added into the page
browser_action.default_popup: a html file to show as a popup
need activeTab to inject js into active tab
add commands object in manifest with array of commands and shortcut keys, listed in background script with browser.commands.onCommand.addListener((command) => { ... });
read stdin, output to stdout. process started as needed
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Native_messaging
create json file in ~/.mozilla/native-messaging-hosts/test-firefox-native.json with path pointing to an executable script