Quote Originally Posted by davewest View Post
Yap... been there for some time, called Responsive Design Mode Allows one to design and view in mobiles based on Android, IOS, Windoze, Tablets, and TV's.. Also to simulate load speeds, touch and such. Even design your own phone if you want to code some. Very useful... I use it quite often..

With Firefox on android Web Developer is an addon, but not very useful..

Many of us use or created tools or have FF addons, that are not widely used or known... which is why links are a quicker way of getting answers.
FWIW: ad blocker plus will interfere with responsive display when using developer tools. At least it did for me in firefox. I couldnt figure out why the responsive images was missing several of the key parts of the website. Then I was struck with the thought of turning off ABP. Once I did that, the expected responsive version appeared perfectly.