As I'm working on my website (HTML5/CSS3), I need a software (free or not) to test my website on multiple browsers and resolutions. I'm not searching for online services, like browserstacks or any others cause I'm not always connected to internet. I forgot to mention, that I'm working on OSX(main workstation) but I also own a computer with W8 running on it so, I'm taking any recommandations. Thanks for all.
EDIT : My website is set on local (Mamp), and I'm trying to make sure it's cross-browser and responsive/adaptative as well. I used to use the "toggle device mode" from chrome but it's not really worth of trust, it didn't show me the same thing since I'm using vh/vw units. I think the mobile phone mode didn't really emulate a phone, but just put the website in a smaller div and keeped the screen size.