The most important change in this update might be one-time permissions, which the company was testing
as far back as April. When you visit a site that asks for permission for a certain feature, like your location or microphone, you can now temporarily allow the permission with a new "Allow this time" button. Before now, you could only block the request or click allow — both of which would remain until you went back and changed the setting. The older options have been renamed to "Allow on every visit" and "Don't allow" to be more clear.
Google says the change will help clear up confusion around browser permissions, especially because it mirrors the three-button prompt already used for many permissions prompts on Android, iPhone, and iPad. A blog post in the developer blog explains, "Chrome user research has shown that users often are not ready to make a persistent decision for website permissions, trying to assess if they get value in return for granting permissions. Offering a one-time Allow option accommodates this need and makes allowing access less risky."