To remove usernames and passwords in gmail screen

In Internet Explorer:
Tools menu => Options => Contents Tab => Personal Information => Auto complete button => Click the buttons “Clear forms” & “Clear passwords”

In Mozilla Firefox:
1. Tools menu => Options.
2. Select the "Privacy" tab & deselect "Remember what I enter in forms and the search bar"
Then in the "Private Data" section, click on the "Clear Now" button & select "Saved form and search history"
3. Click on "Clear Private Data Now" button.

Browser tips

Printing all linked documents:
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In Internet Explorer:
File-> Print -> Options(tab) -> Print all linked documents.

Turn off underlines in web page link:
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In I.E,
Tools menu -> Internet Options ->Advanced(tab) ->undeline link=>Never

To turn off graphics to display all web pages faster:
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Tools-> Internet options -> Advanced -> In the ‘mutimedia’ clear one or more of the ‘show picture’, ‘play animation’, ‘play videos’, ‘play sounds’ check boxes.