usability

I'm looking to define what makes more sense in a page visual hierarchy for both visual design / consistency & accessibility.

Recently when I was using Gmail i ought to notice that Gmail runs an algorithm by which if user types " I have attached " in a mail and does not actually attach mail it shows a dialog confirmation

The current stable version of Chrome (v61) exhibits some undesirable behaviour with styled select elements.

Should we include directions to a user in the UI content that tells them to do something that is visually obvious?

Is there a way to test if a GUI is usable for color blind person?

I am working on an ERP Web App which doesn't need SEO.
In few instances, I may have to use Learn More / Click Here.

I'm working on code diff view design, and would like to gather your opinion on two existing patterns.

Below are screenshots of two different side-by-side diff view designs.

Quoting this article:

I recently built a browser extension like Vimium