How to disable Firefox Telemetry and Data Collection

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NFO:

Mozilla has provided few Settings on Options Page to select what kind of Data do you want to share with Mozilla and want to send to Mozilla Servers.
You can turn on/off Options such as Allow Firefox to send technical and interaction data to Mozilla, Allow Firefox to install and run studies and Allow Firefox to send Crash Reports to Mozilla Servers.
You can change these settings using Privacy & Security Section.
Even after you disable these Options, Firefox still collects and sends Data to Servers.

Disable Telemetry and Data Collection:

1. Open Firefox and type about:config in the Addressbar and press Enter. It'll show you a Warning Message, click on Accept the Risk and Continue Button
2. In the Search Bar, type each of the following Preferences and then set them to the Value provided to the right:
   
   

Preference	Value to change
browser.newtabpage.activity-stream.feeds.telemetry	false
browser.newtabpage.activity-stream.telemetry	false
browser.ping-centre.telemetry	false
datareporting.healthreport.service.enabled	false
datareporting.healthreport.uploadEnabled	false
datareporting.policy.dataSubmissionEnabled	false
datareporting.sessions.current.clean	true
devtools.onboarding.telemetry.logged	false
toolkit.telemetry.archive.enabled	false
toolkit.telemetry.bhrPing.enabled	false
toolkit.telemetry.enabled	false
toolkit.telemetry.firstShutdownPing.enabled	false
toolkit.telemetry.hybridContent.enabled	false
toolkit.telemetry.newProfilePing.enabled	false
toolkit.telemetry.prompted	Number Value 2
toolkit.telemetry.rejected	true
toolkit.telemetry.reportingpolicy.firstRun	false
toolkit.telemetry.server	Delete URL
toolkit.telemetry.shutdownPingSender.enabled	false
toolkit.telemetry.unified	false
toolkit.telemetry.unifiedIsOptIn	false
toolkit.telemetry.updatePing.enabled	false