maximillianos - 1:35 pm on Jul 22, 2010 (gmt 0)
For the same reason Google requires you to conform your way of thinking to theirs.
Because they can.
If you don't want to install it, then don't use it.
I won't be using it. Not by choice though.
I cannot use Bing's Webmaster Tools because I run a Linux laptop. Microsoft did not create a version of Silverlight for Linux. And the free open source version (Moonlight by Novell) does not work with their Webmastertools.
So yes, Microsoft once again shows they cannot build something cross-platform... Bravo!
[If someone else got it to work in Ubuntu Linux / Firefox let me know... Would love to check it out]