feat: Introduce webext run --devtools to open DevTools for the installed add-on right away.

src/cmd/run.js

@@ -28,6 +28,7 @@ const log = createLogger(import.meta.url);
 export type CmdRunParams = {|
   artifactsDir: string,
   browserConsole: boolean,
+  devtools: boolean,
   pref?: FirefoxPreferences,
   firefox: string,
   firefoxProfile?: string,
@@ -75,6 +76,7 @@ export default async function run(
   {
     artifactsDir,
     browserConsole = false,
+    devtools = false,
     pref,
     firefox,
     firefoxProfile,
@@ -174,6 +176,7 @@ export default async function run(
       profilePath: firefoxProfile,
       customPrefs,
       browserConsole,
+      devtools,
       preInstall,
 
       // Firefox runner injected dependencies.

src/extension-runners/firefox-desktop.js

@@ -33,6 +33,7 @@ import type {FirefoxInfo} from '../firefox/index'; // eslint-disable-line import
 type FirefoxDesktopSpecificRunnerParams = {|
   customPrefs?: FirefoxPreferences,
   browserConsole: boolean,
+  devtools: boolean,
   firefoxBinary: string,
   preInstall: boolean,
 
@@ -212,6 +213,7 @@ export class FirefoxDesktopExtensionRunner {
   async startFirefoxInstance() {
     const {
       browserConsole,
+      devtools,
       extensions,
       firefoxBinary,
       preInstall,
@@ -241,6 +243,7 @@ export class FirefoxDesktopExtensionRunner {
       firefoxBinary,
       binaryArgs,
       extensions,
+      devtools,
     });
 
     this.runningInfo.firefox.on('close', () => {
@@ -262,7 +265,7 @@ export class FirefoxDesktopExtensionRunner {
       for (const extension of extensions) {
         try {
           const addonId = await (
-            remoteFirefox.installTemporaryAddon(extension.sourceDir)
+            remoteFirefox.installTemporaryAddon(extension.sourceDir, devtools)
               .then((installResult: FirefoxRDPResponseAddon) => {
                 return installResult.addon.id;
               })

src/firefox/index.js

@@ -90,6 +90,7 @@ export type FirefoxRunOptions = {
   binaryArgs?: Array<string>,
   args?: Array<any>,
   extensions: Array<Extension>,
+  devtools: boolean,
 };
 
 /*
@@ -103,6 +104,7 @@ export async function run(
     firefoxBinary,
     binaryArgs,
     extensions,
+    devtools,
   }: FirefoxRunOptions = {}
 ): Promise<FirefoxInfo> {
 
@@ -164,9 +166,13 @@ export async function run(
     throw error;
   });
 
-  log.info(
-    'Use --verbose or open Tools > Web Developer > Browser Console ' +
-    'to see logging');
+  if (!devtools) {
+    log.info('Use --verbose or --devtools to see logging');
+  }
+  if (devtools) {
+    log.info('More info about WebExtensions debugging:');
+    log.info('https://extensionworkshop.com/documentation/develop/debugging/');
+  }
 
   firefox.stderr.on('data', (data) => {
     log.debug(`Firefox stderr: ${data.toString().trim()}`);

src/firefox/remote.js

@@ -131,7 +131,8 @@ export class RemoteFirefox {
   }
 
   async installTemporaryAddon(
-    addonPath: string
+    addonPath: string,
+    openDevTools?: boolean
   ): Promise<FirefoxRDPResponseAddon> {
     const addonsActor = await this.getAddonsActor();
 
@@ -140,6 +141,7 @@ export class RemoteFirefox {
         to: addonsActor,
         type: 'installTemporaryAddon',
         addonPath,
+        openDevTools,
       });
       log.debug(`installTemporaryAddon: ${JSON.stringify(response)}`);
       log.info(`Installed ${addonPath} as a temporary add-on`);

src/program.js

@@ -697,6 +697,12 @@ Example: $0 --help run.
         demandOption: false,
         type: 'array',
       },
+      'devtools': {
+        describe: 'Open the DevTools for the installed add-on ' +
+                  '(Firefox 106 and later)',
+        demandOption: false,
+        type: 'boolean',
+      },
       'browser-console': {
         alias: ['bc'],
         describe: 'Open the DevTools Browser Console.',

tests/functional/fake-firefox-binary.js

@@ -9,6 +9,7 @@ const REQUEST_INSTALL_ADDON = {
   to: 'fakeAddonsActor',
   type: 'installTemporaryAddon',
   addonPath: process.env.addonPath,
+  openDevTools: false, // Introduced in Firefox 106 (Bug 1787409 / Bug 1789245)
 };
 const REPLY_INSTALL_ADDON = {
   from: 'fakeAddonsActor',

tests/unit/test-firefox/test.firefox.js

@@ -11,6 +11,9 @@ import {fs} from 'mz';
 import * as firefox from '../../../src/firefox/index.js';
 import {onlyInstancesOf, UsageError, WebExtError} from '../../../src/errors.js';
 import {withTempDir} from '../../../src/util/temp-dir.js';
+import {
+  consoleStream, // instance is imported to inspect logged messages
+} from '../../../src/util/logger.js';
 import {
   basicManifest,
   fixturePath,
@@ -240,6 +243,41 @@ describe('firefox', () => {
         });
     });
 
+    it('logs link to debugging docs', async () => {
+      const runner = createFakeFxRunner();
+      consoleStream.flushCapturedLogs();
+      consoleStream.startCapturing();
+
+      const expectedMessage = 'More info about WebExtensions debugging:';
+      const expectedURLToDocs =
+        'https://extensionworkshop.com/documentation/develop/debugging/';
+      await runFirefox({fxRunner: runner, devtools: false});
+      assert.notOk(consoleStream.capturedMessages.find(
+        (msg) => msg.includes(expectedMessage)
+      ));
+      assert.notOk(consoleStream.capturedMessages.find(
+        (msg) => msg.includes(expectedURLToDocs)
+      ));
+
+      consoleStream.flushCapturedLogs();
+
+      await runFirefox({fxRunner: runner, devtools: true});
+      const foundMessage = consoleStream.capturedMessages.find(
+        (msg) => msg.includes(expectedMessage)
+      );
+      const foundDocURL = consoleStream.capturedMessages.find(
+        (msg) => msg.includes(expectedURLToDocs)
+      );
+
+      // Expect the logs to be found.
+      assert.ok(foundMessage);
+      assert.ok(foundDocURL);
+
+      // Expected to be emitted as info level logs.
+      assert.ok(foundMessage?.includes('[info]'));
+      assert.ok(foundDocURL?.includes('[info]'));
+    });
+
   });
 
   describe('copyProfile', () => {
@@ -1003,7 +1041,6 @@ describe('firefox', () => {
         sinon.assert.calledOnce(fakeAsyncFsStat);
       }
     ));
-
   });
 
 });

tests/unit/test-firefox/test.remote.js

@@ -297,11 +297,11 @@ describe('firefox.remote', () => {
         const addonsActor = 'addons1.actor.conn';
         const addonPath = '/path/to/addon';
 
-        client.request.withArgs({
+        client.request.withArgs(sinon.match({
           type: 'installTemporaryAddon',
           to: addonsActor,
           addonPath,
-        }).resolves({
+        })).resolves({
           addon: {id: 'abc123@temporary-addon'},
         });
 

tests/unit/test.program.js

@@ -552,6 +552,21 @@ describe('program.main', () => {
       });
   });
 
+  it('opens devtools when --devtools is specified', () => {
+    const fakeCommands = fake(commands, {
+      run: () => Promise.resolve(),
+    });
+    return execProgram(
+      ['run', '--devtools'],
+      {commands: fakeCommands})
+      .then(() => {
+        sinon.assert.calledWithMatch(
+          fakeCommands.run,
+          {devtools: true}
+        );
+      });
+  });
+
   async function testWatchFileOption(watchFile) {
     const fakeCommands = fake(commands, {
       run: () => Promise.resolve(),