Download Firefox here

Safari can be downloaded from here

For Firefox

• Type “about:config” (without quotes) in the address bar and press enter
• A list will appear on a page. Find out “general.useragent.extra.firefox”, don’t worry they are in alphabetical order
• Right click and select modify, it would be something like “Firefox/2.0.0.14?, chang it to”Mobile Safari 1.1.3?  (without quotes)
• Done
• Now goto http://imgs.zinio.com/iphone/ and start reading your favorite magazines

For Safari

• From menu bar goto Edit>Preferences and select the advanced tab
• In the advanced tab,check the box corresponding to ’show Develop menu in menu bar’ at the bottom
• Now  a new menu Develop will appear on the menu bar
• Goto Develop>User Agent and select Mobile Safari 1.1.3 -iPhone
• Done
• Now goto http://imgs.zinio.com/iphone/ and start reading your favorite magazines

Here is the list of magazines you can read online

U.S. News & World Report
Playboy
U.S. News & World Report
Playboy
Saveur
Popular Photography
Men’s Health
Kiplinger’s
Popular Mechanics
Penthouse
Viv
Car and Driver
PC Magazine
Elle
Technology Review
Outside
Macworld
Esquire
NME
Macworld Espanol
Lonely Planet
Reders Digest