According to section 3.1 of W3C Geolocation API recommendation:
An end-user will generally give express permission through a user interface, which usually present a range of permission lifetimes that the end-user can choose from. The choice of lifetimes vary across user agents, but they are typically time-based (e.g., "a day"), or until browser is closed, or the user might even be given the choice for the permission to be granted indefinitely.
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Although the granularity of the permission lifetime varies across user-agents, this specification urges user agents to limit the lifetime to a single browsing session by default (see 3.4 Checking permission to use the API for normative requirements).
Is this recommendation of a single browsing session respected by major browsers? More generally, what are the lifetimes defined by major browsers for geolocation access?