Chrome browser for more than 2 years . I'd 
Like to say honestly that this is the most 
Versatile and beautiful browser ever designed.
It will download any file which Chrome browser
Rejects for security reasons. But I'd like to add
a small suggestion. I'd usually download files 
without thinking whether the same files have 
already downloaded or not . This has been a
Concern if I want to save significant internet service 
Provider/Network operator's Charges. 
My suggestion is why don't you code this 
Browser in a way it detects whether a
Downloadable file is already downloaded or
Not. Currently this feature is available in 
Google Chrome browser not in Firefox Browser.

Sir I've been using Firefox Browser alongside Chrome browser for more than 2 years . I'd Like to say honestly that this is the most Versatile and beautiful browser ever designed. It will download any file which Chrome browser Rejects for security reasons. But I'd like to add a small suggestion. I'd usually download files without thinking whether the same files have already downloaded or not . This has been a Concern if I want to save significant internet service Provider/Network operator's Charges. My suggestion is why don't you code this Browser in a way it detects whether a Downloadable file is already downloaded or Not. Currently this feature is available in Google Chrome browser not in Firefox Browser.