Useful Chrome extensions for OS X
FlashBlock by josorek
No developer site listed
Description:
Sets up Chrome to default to blocking Flash content on webpages.
Pros:

Helps reduce download time and bandwidth usage since flash files aren't loaded by default.

Easy to adjust blocking filter to allow flash for entire sites via a button in the address bar.


Cons:

Sometimes removes stuff without an easy way to add it back with the extension running.