A web beacon can also be known as a web bug, 1 by 1 GIF, invisible GIF and tracker GIF.
Cookies are either ‘session’ or ‘persistent’ cookies, depending on how long they are stored for: In addition to cookies, Future’s websites also use web beacons.
You can by using any plugin technology that will allow you to implement a secure plugin or browser extension that will be able break out of the security sandbox of the user's browser and to use APIs to interact with attached devices, like accessing the video streams of a webcam.
Ways of doing it could be (but not limited to): The problem is not really to find an alternative technology that works, but these technologies' ubiquity (or lack thereof).
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