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I want to keep firefox 45 esr, dont want updates, how do I get out of esr update channel?

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I selected "Never check for updates (not recommended: security risk)" I have ‘about:config’ ‘app.update.auto’ set to ‘false’

But still firefox automatically updates, to most recent version, upon launch. How can prevent it from updating, I want to keep Firefox 45 esr.

I selected "Never check for updates (not recommended: security risk)" I have ‘about:config’ ‘app.update.auto’ set to ‘false’ But still firefox automatically updates, to most recent version, upon launch. How can prevent it from updating, I want to keep Firefox 45 esr.

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Type about:preferences#advanced<enter> in the address bar. Under Advanced, Select Update.

[v56+]; Type about:preferences#general<enter> in the address bar. Select Update.

Check the settings. "Do Not Check For Updates."

Also turn off Use a background service to install updates <Windows Only>

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Why do you want to stick with Firefox 45?

The last "legacy" release of Firefox was Firefox 52 ESR, which received its final update a few months ago.