feat: display feedback form on extension uninstall (#799)

closes #468

add-on/src/background/background.js

@@ -3,10 +3,12 @@
 
 const browser = require('webextension-polyfill')
 const { onInstalled } = require('../lib/on-installed')
+const { getUninstallURL } = require('../lib/on-uninstalled')
 const { optionDefaults } = require('../lib/options')
 
-// register onInstalled hook early, otherwise we miss first install event
+// register lifecycle hooks early, otherwise we miss first install event
 browser.runtime.onInstalled.addListener(onInstalled)
+browser.runtime.setUninstallURL(getUninstallURL(browser))
 
 // init add-on after all libs are loaded
 document.addEventListener('DOMContentLoaded', async () => {

add-on/src/lib/ipfs-companion.js

@@ -763,6 +763,10 @@ module.exports = async function init () {
       return state
     },
 
+    get runtime () {
+      return runtime
+    },
+
     get dnslinkResolver () {
       return dnslinkResolver
     },

add-on/src/lib/on-uninstalled.js

@@ -0,0 +1,14 @@
+'use strict'
+/* eslint-env browser */
+
+const stableChannels = new Set([
+  'ipfs-firefox-addon@lidel.org', // firefox (for legacy reasons)
+  'nibjojkomfdiaoajekhjakgkdhaomnch' // chromium (chrome web store)
+])
+
+const stableChannelFormUrl = 'https://docs.google.com/forms/d/e/1FAIpQLSfLF7uzaxRKiF4XpPL9_DvkdaQHoRnDihRTZ1uVL6ceQwIrtg/viewform'
+
+exports.getUninstallURL = (browser) => {
+  // on uninstall feedback form shown only on stable channel
+  return stableChannels.has(browser.runtime.id) ? stableChannelFormUrl : ''
+}