Help me how to use pdf view extension?

hello!!any one help me how to use pdf view extension.i have extension but i dont know how to use it well
if there is any English video tutorial please help me?

Free or paid?

Both extension developers might have released guide also regarding the usage of their extension… have you searched in community?

Unfortunately we do not know, which extension are you talking about… what about providing a link?


yes he send me but i didnt see guide how to use it

is free extension ,if you have any guide how to use it kindly help me

i have only file .aix