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?

The following solution already exist:

- Hubbub: HTML5 compliant parsing library
- LibCSS: CSS parser and selection engine
- LibDOM: implementation of the W3C DOM
- Libnsbmp: decoding library for BMP and ICO image file formats
- Libnsgif: decoding library for the GIF image file format

That's all in C and supposedly lightweight. All from the NetSurf browser. http://www.netsurf-browser.org/projects/

Just start from there, cleaning those stuff up and adding everything else that's needed (especially javascript and an intuitive and minimal GUI).
No need for Assembly.