The tech giant has detailed the pair of policies, which are set to be implemented later this year with at least 90 days' notice for developers before they come into effected.
As reported by The Verge, the big change is that all extensions will have to use the "minimum set of permissions necessary" when asked a user for access to certain data.
Essentially, this means if a task can be carried out in a number of ways, the extension must take the one that needs to access the least sensitive amount data.
In addition, Google is also set to require more extensions to post their privacy policies clearly in the Chrome Web Store.
Although is already necessary for extensions requiring "personal and sensitive user data", it is being rolled out to those that need access to any kind of content or personal communication generated by the user.
Any developers that con't comply will be taken down from the tore and disabled for Chrome browsers.
Earlier this month, it was revealed Google plans to add an incognito mode to its search and maps apps.
CEO Sundar Pichai explained the company will soon implement a system which makes the private mode available through its other apps, including search and maps.
Pichai made the announcement as part of a flurry of privacy-related updates at this year's I/O developer conference, and showed attendees a screenshot of the function in action.
The new mode will allow users to keep their location searches a secret, so that their history is not stored by the app as it would be if they didn't use incognito mode.
So far, Pichai has only said the feature will be rolled out "soon", but it will come to search and maps at the same time.