There is no system supported method for disabling ctrl+click from functioning as a secondary click in Mavericks.
You can use Karabiner Elements to remap "Control+LeftClick to LeftClick," which essentially disables this behavior system-wide.
Install Karabiner Elements:
When you then go to open Karabiner Elements, it will have a couple security issues you need to resolve.
The first will be to allow the installation of a kernel extension:
The second will be to allow input monitoring:
Once those security issues are handled, you then need to add a complex modification. Visit:
Import on the
Disable Ctrl Click modification:
This will add the complex modification to Karabiner Elements and enable the functionality:
However, I don't know of any web apps (and certainly not most or many) which don't recognize and respect Command+LeftClick as a way to multi-select. That is the standard for macOS.