improve js rewriting functionality by not relying on js to get proxy and proxified URLs; direct injection from golang

proxychain/requestmodifers/spoof_referrer_from_bing_search.go

@@ -6,13 +6,14 @@ import (
 
 // SpoofReferrerFromBingSearch modifies the referrer header
 // pretending to be from a bing search site
-func SpoofReferrerFromBingSearch(url string) proxychain.RequestModification {
+func SpoofReferrerFromBingSearch() proxychain.RequestModification {
 	return func(chain *proxychain.ProxyChain) error {
 		chain.AddRequestModifications(
 			SpoofReferrer("https://www.bing.com/"),
 			SetRequestHeader("sec-fetch-site", "cross-site"),
 			SetRequestHeader("sec-fetch-dest", "document"),
 			SetRequestHeader("sec-fetch-mode", "navigate"),
+			ModifyQueryParams("utm_source", "bing"),
 		)
 		return nil
 	}