moved to #27911

cli/lib/cli.js

@@ -666,6 +666,16 @@ module.exports = {
 
     debug('program parsing arguments')
 
+    const PATH_TO_CONFIG = require('path').join(process.cwd(), 'cypress.config.js')
+    if (require('./fs').existsSync(PATH_TO_CONFIG)) {
+      const CONFIG_BROWSER = require(PATH_TO_CONFIG).browser
+
+      if(!args.includes('--browser') && CONFIG_BROWSER) {
+        args.push('--browser')
+        args.push(CONFIG_BROWSER)
+      }
+    }
+
     return program.parse(args)
   },
 }