Why browsers are bloated

https://github.com/WebKit/webkit/blob/master/Source/WebCore/platform/Scrollbar.cpp
https://github.com/WebKit/webkit/blob/master/Source/WebCore/platform/win/ScrollbarThemeWin.cpp
Let's reinvent the fucking scrollbar, which every goddamn platform with a UI already has, and make it behave subtly different from the native one!

Right-click a native scrollbar in some other app:
- Scroll Here
- Top
- Bottom
- Page Up
- Page Down
- Scroll Up
- Scroll Down

Right-click a scrollbar in Chrome:
- Back
- Forward
- Reload
- Save As...
...

Right-click a scrollbar in Firefox and Opera:
Absolutely fucking nothing happens!

What the fuck!? How did these terminally retarded idiots get involved in creating one of the most important pieces of software to the average user?

>>186
The whole idea of inertial scrolling is that you sense when the user takes the finger off the screen/touchpad and then continue scrolling at the same velocity; how do you propose that be done with a mouse wheel?

>>187
Android, but I'd rather not use a mobile device if I don't need to.

>>188
Inactive tabs (or minimised windows for that matter) shouldn't need any repainting.

>>190
It's "smooth" if you have enough GPU/CPU power to waste moving the existing contents and drawing each new line of pixels separately, but it still feels laggy because you're forced to scroll only as fast as the machine can keep up. There's no snappy ultra-responsive multi-pixel jumps when you scroll (which the "UX designers" seem to abhor...)