javascript - Chrome Extension start up pages missing main_frame request -


i have listener function on chrome.webrequest.onheadersreceived uses data main_frame request, , works fine.

except! when chrome set open specific set of pages on start (has more one), pages loaded automatically in background don't seem have main_frame request.

is chrome loading start pages in special way don't understand? how go either getting main_frame request or preventing them loading in background on browser start up?


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