How to work with a browser in the background in C#?

Question

Browsers

Tell me, with what you can work with the browser in the background, what to use? The program should be able to fill out forms, and click on buttons, respond to various problems on the page (such as a publication error, etc.) while using a proxy and cookies. I must say right away that Selenium is not suitable. I'm not asking for full code. Throw in resources or write yourself how to implement this in C # ...

Answer 1

I don't see any reason why selenium can't fit. Selenium can run a browser in headless mode: executeautomation.com/blog/running-chrome-in-headl...
But if selenium is fundamentally impossible, then look at PuppeteerSharp and Playwright
Well, Cefsharp.Offscreen, which you rejected for a reason " not exactly that."
More tools, in principle, are not and are not needed.