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I'm trying to test my app on older versions of firefox. My code relies on the browser version inside the user agent of browser:

console.log(navigator.userAgent)

I installed various older versions of firefox from this page (versions: 33, 34, 39, os: windows) and installed them but the user agent for all of them are Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:;secssobrowser) Gecko/20100101 Firefox/" which doesn't include the browser version.

Does anyone have any idea why the browser version is not included in the user agent?

Iman Mahmoudinasab
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