Я использую Angular и получаю консольную ошибку только в Firefox " [WDS] Отключено! ".
Вот моя версия Angular-Cli.
Angular CLI: 6.0.1
Node: 8.11.1
OS: win32 x64
Angular: 6.0.1
... cli, common, compiler, compiler-cli, core, forms, http
... language-service, platform-browser, platform-browser-dynamic
... router
Package Version
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@angular-devkit/architect 0.6.1
@angular-devkit/build-angular 0.6.1
@angular-devkit/build-optimizer 0.6.1
@angular-devkit/core 0.6.1
@angular-devkit/schematics 0.6.1
@angular/animations 6.0.4
@ngtools/webpack 6.0.1
@schematics/angular 0.6.1
@schematics/update 0.6.1
rxjs 6.2.0
typescript 2.7.2
webpack 4.6.0