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Does Firefox change the installation date in control panel when they upgrade?

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I installed Mozilla Firefox in early September. 6 weeks later I noticed the installation date for Firefox in control panel had changed from September to October (appeared as if it had been uninstalled and reinstalled). I uninstalled it, and reinstalled it, and I noted the date of installation, October 18. I kept an eye on it. November 5, I checked the control panel, I noted the installation date had changed again, to November 1. Now my dates may be off a day, but is it normal for Firefox to change the installation date when upgrading, and even more disturbing, is it possible to do it without the user knowing it's being done? And remotely?

I installed Mozilla Firefox in early September. 6 weeks later I noticed the installation date for Firefox in control panel had changed from September to October (appeared as if it had been uninstalled and reinstalled). I uninstalled it, and reinstalled it, and I noted the date of installation, October 18. I kept an eye on it. November 5, I checked the control panel, I noted the installation date had changed again, to November 1. Now my dates may be off a day, but is it normal for Firefox to change the installation date when upgrading, and even more disturbing, is it possible to do it without the user knowing it's being done? And remotely?

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Each time you update any program, you install it. The installation date in Control Panel will therefore update accordingly. This happens when the installer runs on your system: there's no remote interference involved.

By default, Firefox updates automatically. The setting is found under Options - Advanced - Update. If you click the Show Update History button there, you'll no doubt find Firefox was updated on November 1st.