Could you tell me about ad-dons?

[mercury]

What are the most important ad-dons should be in my browser? Could you tell me where I can get Page rank checker?

 

[Hefemeister]

One would assume you are using firefox. here are some page rank checkers via google.
page rank checker add on - Google Search

 

[Trotter]

The main addons, as in plugins, would be Flash, Java, Shockwave, QuickTime, and RealPlayer. Windows Media Player if you are using Firefox.

As for extensions, you can find just about anything if you look.... so, could you be more specific?

 

[KSoD]

IF you are using Chrome the only Ad-Ons you can have is Google Gears.