Pictures are not responsive on Firefox & Internet Explorer, Using grid on views
I use the Adaptive Image module. It gives you an adaptive behavior you can select when on Admin>Configuration>Image Styles. In other words, you'll need to create an image style with the new adaptive behavior (it should appear in the pick list after you install the module), or alternately, add the adaptive behavior to existing image styles. Once you've done that, you just need to use the adaptive image style in the view, either by adjusting the image field settings, or by changing the settings on the display type fields if you're using content or rendered entities. For the most part, I found that doing the above steps gives me responsive images, but I sometimes have to tweak my CSS also.