flashlang/src/manifest.json

{
	"browser_specific_settings": {
		"gecko": {
			"id": "addon@example.com",
			"strict_min_version": "42.0"
		}
	},
	"name": "Lingo",
	"manifest_version": 2,
	"version": "0.1",
	"browser_action": {
		"browser_style": true,
		"default_popup": "popup.html"
	},
	"background": { "scripts": ["background.bundle.js"] },
	"permissions": ["<all_urls>", "sessions", "webRequest", "webRequestBlocking"]
}