Hi there,
Understood the requirements, I can build the 2 browser plugins relatively easily for you in a quick turnaround, the issue I foresee is: "e. ONLY WHEN ALL THE TASKS ABOVE ARE DONE, IT WILL CLEAR BROWSER CACHE, COOKIES, HISTORY – EVERYTHING." - this is something I never done before, the rest with automated URL loading and tab opening should be a smooth process as I've done similar things in plugins before.
Regards,
Julijan