I can make HTML-Markup-Error finding in Mozilla Firefox more comfortable :)
I help you jumping right to the errors you need to fix in "Source View" (Ctrl+U)!
Go to this website and drag the bookmarklet into your bookmarklets-list.
Be aware to choose the bookmark type you want, a static one or an automatically updating one (reflecting this repo)!
The automatically updated one might not work on specific sites due to their Content-Security-Policy.
The static one should work all the time.
Copy bundle.js from dist after building into a console on a Source-View-Page (Ctrl+U) in Firefox.
You may also find a way to save a browser snippet in Firefox, similar to how it's done in Chrome.
To get started, simply run npm run dev.
That will spin up a local server on port 8041.
Open http://localhost:8041 in your browser and drag the provided bookmarklet into your bookmarks bar.
This bookmarklet is automatically reflecting the newest (automatically built) bundle.js-Code in ./dist.
For pushing:
You don't need to build manually; the CI will take care of generating index.html and the bundle outside the repo.