Add an input option to select a specific proxy provider

[jancurn]

The reality is, each underlying proxy provider sometimes returns slightly different results. We should provide users with the ability to select the provider.

[jancurn]

Actually, a cleaner and more generic way to do this is to add an input field called Additional query parameters that will be appended to the URL. We can add a special param to pick the provider, or use this for other customizations.

[metalwarrior665]

This would be great for the focused paid ads scraping.

[jancurn]

BTW you can already do this now, using the URLs instead of search tersm and using the xprovider query parameter

[metalwarrior665]

Yes but it is not documented and the differences between providers are not explained.

Also, we had a use-case for screenshots where some providers show a pop-up.