Now that all 3 browser engines are tested

in CI on Lambdatest, we don't really need to run them again in the release script.
However, for safety, run them locally on Chrome and Firefox still.

test/karma.browsers.matrix.js

@@ -8,7 +8,6 @@
 module.exports = {
     // On developers machines, Chrome is most likely to be installed.
     local: ['Chrome'],
-    //local: ['bs_safari_latest_supported'],
 
     // When Lambdatest credentials aren't available, use Chrome and Firefox on Github Actions:
     ciLocal: ['Chrome', 'Firefox'],
@@ -21,11 +20,13 @@ module.exports = {
     ],
 
     // Test matrix used before every npm publish.
+    // Note: The script tools/release.sh will run the tests
+    // locally on Chrome and Firefox. However, this is just an
+    // extra safety check as all tests must anyway have been successful
+    // on the CI that tests on all configured browsers in Lambdatest.
     pre_npm_publish: [
-        'remote_chrome',
-        'remote_edge',
-        'remote_safari',
-        'remote_firefox'
+        'Chrome',
+        'Firefox'
     ]
 }