I am making a Chrome extension for internal entreprise use, outside of Chrome Web Store. Users might be on Windows, Mac, Linux.

What are the current ways to achieve this non-store distribution, without having a popup alert on each Chrome start? (ManifestV3 Chrome extensions)

(If I remember correctly, there is an alert for installation in Developer Mode every now and then on each Chrome restart)

Important note: this is linked: Is it possible to create a Chrome Extension for private distribution outside Chrome Web Store? but both the question (2012) and main answers (2012, 2013) are outdated with Chrome as of 2025.