Windows 10 in 1909, codenamed '19H2 ′, is a small update with improvements that focus mainly on performance.
Those of you interested in Microsoft released Windows 10 19H2 as a cumulative update for Windows 10 users, and you can upgrade if you are already running Windows 10 May 2019 Update, via Windows Update.
Open the Settings application and in the Update and Security section open Windows Update. Select Check for updates to the right. Once you see it Windows 1909, you can select "Download and install now".
For those who want to download ISO directly from their browser, open Google Chrome on the Microsoft page.
Open Developer Tools with F12 or from the three tones menu. In Developer Tools, click the Mobile icon. This is how the Mobile Device Emulator will start.
If you are using Firefox, follow the path shown in the image below, and you will be able to download the ISO you are looking for immediately: