# Constant or well known mox-extension://\<uuid\> for webExtension?

**URL:** <https://discourse.mozilla.org/t/constant-or-well-known-mox-extension-uuid-for-webextension/9701>\
**Category:** Add-ons\
**Created:** [July 13, 2016, 1:28am UTC](https://discourse.mozilla.org/t/constant-or-well-known-mox-extension-uuid-for-webextension/9701 "2016-07-13T01:28:18Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![desktopd](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/desktopd/32/4520_2.png) [@desktopd](https://discourse.mozilla.org/u/desktopd)\
**Post date:** [July 23, 2016, 10:09am UTC](https://discourse.mozilla.org/t/constant-or-well-known-mox-extension-uuid-for-webextension/9701/7 "2016-07-23T10:09:51Z")

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_That’s by design._

You can do whatever you want with the dynamic identifier obtained this way, can’t you?? Just different from Chrome. (Different is good, because _Chrome is terrible for privacy_.) **Tell the external service the identifier each time** , but this doesn’t seem good for privacy. You need to be clear in your add-on’s privacy policy about its behavior.

* * *

The identifiers need to be different for each installation in order to make privacy-invading fingerprinting harder. But this should be done to improve the situation:  
[https://discourse.mozilla-community.org/t/proposal-isolated-content-environment/9866?u=desktopd](https://discourse.mozilla-community.org/t/proposal-isolated-content-environment/9866?u=desktopd)

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_[View the full topic](https://discourse.mozilla.org/t/constant-or-well-known-mox-extension-uuid-for-webextension/9701)._