which is first browser?

mozilla firefox The browser creates a separate system process for each opened tab, as well as its various plugins and extensions, depending on how its multiprocess infrastructure is implemented. This prevents complete browser crashes from happening since mozilla firefox isolates each individual activity; basically, if one part malfunctions,

define "browser"...
technically speaking, the first program to allow hyperlinks to other pages/websites came about in 1990, and was called "WorldWideWeb" (later named "Nexus").
it could not load images, which did not come into being until 1995.
even Internet Explorer was based on Mosaic for at least a decade...

That green guy from super mario