build: update firefox to latest version

Updates our Firefox version that is used for Bazel unit tests to v78.0.
Previously we were using v68.

To update the Firefox version, we had to set up a custom Browser target
with repositories as the version for Firefox is usually hard-coded in
`rules_webtesting` and we cannot control that.

See related change in the dev-infra package:
angular/angular#38029.

Author: devversion

WORKSPACE

@@ -85,16 +85,6 @@ load("@io_bazel_rules_webtesting//web:repositories.bzl", "web_test_repositories"
 
 web_test_repositories()
 
-load("@io_bazel_rules_webtesting//web/versioned:browsers-0.3.2.bzl", "browser_repositories")
-
-browser_repositories(
-    # Chrome is brought in by `@npm_dev_infra_private` for better version control and
-    # RBE experience where individual browser archives per platform are provided.
-    # TODO: Do the same for Firefox (but it is not used for local development): DEV-114
-    chromium = False,
-    firefox = True,
-)
-
 # Fetch transitive dependencies which are needed to use the Sass rules.
 load("@io_bazel_rules_sass//:package.bzl", "rules_sass_dependencies")
 

scripts/run-component-tests.js

@@ -61,7 +61,7 @@ if (local && (components.length > 1 || all)) {
   process.exit(1);
 }
 
-const browserName = firefox ? 'firefox-local' : 'chromium';
+const browserName = firefox ? 'firefox' : 'chromium';
 const bazelBinary = `yarn -s ${watch ? 'ibazel' : 'bazel'}`;
 const configFlag = viewEngine ? '--config=view-engine' : '';
 

tools/defaults.bzl

@@ -166,7 +166,7 @@ def karma_web_test_suite(name, **kwargs):
             # Note: when changing the browser names here, also update the "yarn test"
             # script to reflect the new browser names.
             "@npm_angular_dev_infra_private//browsers/chromium:chromium",
-            "@io_bazel_rules_webtesting//browsers:firefox-local",
+            "@npm_angular_dev_infra_private//browsers/firefox:firefox",
         ]
 
     for opt_name in kwargs.keys():