Browser Settings For IE and Mozilla.

IE

Step 1 Tools > Internet Options > Advanced

Step 2
Then look for the following option under Multimedia
"Enable Automatic Image Resizing"
Uncheck this option.

Mozilla and Firefox

Mozilla
Edit > Preferences > Adnanced Settings

Then look for the following option under Appearance
"Resize large Images To Fit Browser Window"
Uncheck this option.
Firefox
Tools > Options > Adnanced Settings
Then look for the following option under Multimedia
"Resize large Images To Fit Browser Window"
Uncheck this option.