fix: Support FIREFOX_BINARY again for Running web extension from /hom…

…e/sj/Desktop/FOSS/Mozilla/web-ext

run: InvalidManifest: Could not read manifest.json file at /home/sj/Desktop/FOSS/Mozilla/web-ext/manifest.json: Error: ENOENT: no such file or directory, open '/home/sj/Desktop/FOSS/Mozilla/web-ext/manifest.json'
    at _callee$ (/home/sj/Desktop/FOSS/Mozilla/web-ext/dist/webpack:/src/util/manifest.js:30:11)
    at tryCatch (/home/sj/Desktop/FOSS/Mozilla/web-ext/node_modules/regenerator-runtime/runtime.js:62:40)
    at GeneratorFunctionPrototype.invoke [as _invoke] (/home/sj/Desktop/FOSS/Mozilla/web-ext/node_modules/regenerator-runtime/runtime.js:336:22)
    at GeneratorFunctionPrototype.prototype.(anonymous function) [as throw] (/home/sj/Desktop/FOSS/Mozilla/web-ext/node_modules/regenerator-runtime/runtime.js:95:21)
    at step (/home/sj/Desktop/FOSS/Mozilla/web-ext/dist/webpack:/~/babel-runtime/helpers/asyncToGenerator.js:17:1)
    at /home/sj/Desktop/FOSS/Mozilla/web-ext/dist/webpack:/~/babel-runtime/helpers/asyncToGenerator.js:30:1
    at run (/home/sj/Desktop/FOSS/Mozilla/web-ext/dist/webpack:/~/core-js/library/modules/es6.promise.js:87:1)
    at /home/sj/Desktop/FOSS/Mozilla/web-ext/dist/webpack:/~/core-js/library/modules/es6.promise.js:100:1
    at flush (/home/sj/Desktop/FOSS/Mozilla/web-ext/dist/webpack:/~/core-js/library/modules/_microtask.js:18:1)
    at nextTickCallbackWith0Args (node.js:420:9)

src/program.js

@@ -218,7 +218,7 @@ Example: $0 --help run.
       })
     .command('run', 'Run the web extension', commands.run, {
       'firefox': {
-        alias: 'f',
+        alias: ['f', 'firefox-binary'],
         describe: 'Path to a Firefox executable such as firefox-bin. ' +
                   'If not specified, the default Firefox will be used.',
         demand: false,

tests/functional/test.cli.run.js

@@ -47,3 +47,44 @@ describe('web-ext run', () => {
          });
        }));
 });
+
+describe('web-ext run', () => {
+  it(
+    'should accept: --no-reload --source-dir SRCDIR --firefox-binary FXPATH',
+     () => withTempAddonDir(
+       {addonPath: addonPath},
+       (srcDir) => {
+         const argv = [
+           'run', '--verbose', '--no-reload',
+           '--source-dir', srcDir,
+           '--firefox-binary', fakeFirefoxPath,
+         ];
+         const spawnOptions = {
+           env: {
+             PATH: process.env.PATH,
+             EXPECTED_MESSAGE: EXPECTED_MESSAGE,
+             addonPath: srcDir,
+           },
+         };
+
+         const cmd = runCommand(webExt, argv, spawnOptions);
+
+         return cmd.waitForExit.then(({exitCode, stdout, stderr}) => {
+           if (stdout.indexOf(EXPECTED_MESSAGE) < 0) {
+             reportRunCommandError({
+               argv,
+               exitCode,
+               stdout,
+               stderr,
+             }, 'The fake Firefox binary has not been executed');
+           } else if (exitCode !== 0) {
+             reportRunCommandError({
+               argv,
+               exitCode,
+               stdout,
+               stderr,
+             });
+           }
+         });
+       }));
+});