Instead of waiting for perfection, run with what you’ve got, and fix it as you go.
After that last chapter about screenshots, I’m sure you want to get back to the browser so badly that you’re having withdrawal symptoms. Remain calm; we’re headed straight back into the browser—in fact, not one, not two, but several browsers on every device you have!
Once your client approves of the general direction you’re taking the design, there’s no longer a need to present images. At this point, more detailed feedback is necessary on all page types, as opposed to the few that you presented as screenshots. Since you have a web-based mockup, now is the time to show all the stakeholders how your design works ...