Question: what is not a common web browser?
Answer: Stainless. Stainless is a browser created in response to Google Chrome. ... 
Maxthon. Maxthon is a highly configurable browser that places an emphasis on security. ... 
Sleipnir. ... 
Swiftfox. ... 
Lunascape. ... 
Konqueror. ... 
SeaMonkey. ... 
OmniWeb.