1. An accessory mounting system for a vehicle, said system comprising: a bracket attached at a windshield of a vehicle equipped with said accessory mounting system; said bracket comprising a windshield-facing side; said bracket comprising a cabin-facing side; said bracket comprising first structure; control circuitry housed in a housing; wherein said control circuitry is associated with an electronic device housed in said housing; wherein said electronic device is selected from the group consisting of a microphone, a camera, an antenna, a loudspeaker, a rain sensor and an automatic toll booth transducer; wherein said control circuitry is in communication with a vehicle bus system of the equipped vehicle; said housing comprising second structure; and wherein said first structure and said second structure are configured to enable said housing (i) to be attached to said bracket with said bracket attached at the vehicle windshield and (ii) to be detached from said bracket with said bracket attached at the vehicle windshield.