I am a Malaysian. I will be travelling to Métabief in France in June 2019 for a week.
As I will land at Geneva airport in Switzerland, I am wodering whether I need any visa in Switzerland and to cross border.
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France and Switzerland are both part of the Schengen area, so your visa requirements for a short visit are those set out in the Schengen visa policy. There you can find a link to a document setting out lists of countries whose citizens do and do not need visas for short visits to the Schengen area. Malaysia appears under the "List of third countries whose nationals are exempted from holding a visa when crossing the external borders", so as a Malaysian citizen you do not need a visa to enter the Schengen area.
When you arrive in the Schengen area (it sounds like this is Geneva, although maybe you have some other connection) you'll have to show the border guard your passport, probably answer a few questions about the purpose of your trip, and then receive an entry stamp.
There are typically no border checks when you travel between countries within the Schengen area, though occasional spot-checks are possible. This is nothing to worry about if it happens, just show them your passport with the entry stamp.