refac: improve multi browser support

src/manifests/firefox.ts

@@ -0,0 +1,20 @@
+import { createManifest } from '../../lib/createManifest'
+import baseManifest from './manifest.json'
+import pkg from '../../package.json'
+
+const updatedFirefoxManifest = {
+  ...baseManifest,
+  background: {
+    scripts: [baseManifest.background.service_worker],
+  },
+  action: {
+    "default_popup": "interface/index.html#settings",
+  },
+  browser_specific_settings: {
+    gecko: {
+      id: pkg.author.email,
+    },
+  }
+}
+
+export const firefox = createManifest(updatedFirefoxManifest, 'firefox')