Then I displayed the MD5 and hash values (SHA1) etc. I did a quick test and downloaded the Windows installer from the Mozilla Firefox download page twice in a row. The mechanism is briefly mentioned in the Bugzilla bug tracker – and describes here that the hash value generated this way is unique for each installation. This identifier is transmitted to Mozilla during the installation and the first execution.ĭiscussion about Firefox dltoken in the bug tracker That's because Internet users who download the Firefox web browser from the official Mozilla website are given a unique identifier associated with the installer.

But that is exactly what happens during the installation. If you download the Firefox installer from the Mozilla web pages and then install it, you don't expect it to generate a unique browser identifier. Firefox generates dltoken identifier via installer emailed me over the weekend to point out this fact (thanks for that), which was first published by Martin Brinkmann on. Firefox-Download-Seite entsprechend, wie nachfolgend zu sehen ist.īut possibly the Firefox browser is a wolf in sheep's clothing. Addendum: Statement from Mozilla added.įirefox is considered a privacy browser par excellence, and Mozilla users advertise this accordingly on the Firefox download page, as can be seen below.

This identifier, called dltoken, is confirmed in a Mozilla bug report. Did you know that Firefox registers a unique installer ID in the browser? When someone downloads the Firefox installer from the Mozilla web pages and then installs the Firefox browser, a unique identifier is generated during this process and sent to Mozilla when the browser is first launched.

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