Slow Firefox startup after Windows Startup with lots of tabs open

[dd]

Q: When I put my Windows PC in Hibernate mode with Firefox open with lots of tabs (10-12+), on wakeup when I click on any tab it takes ages to get the page (>5 mins). I used Resource Monitor to find out it is accessing files in my storage/default folder of my profile.

Does anyone else have this happen to them?

What is the best way to reduce this wait?  

It also happens when I close Firefox while tabs are open and shut down the computer.  Again, on FF startup all tabs are remembered and try to open but are super slow. Of course, this doesn't happen if I close all tabs and then Firefox and start opening new tabs on startup but  I just like the convenience of having my favourite tabs already open. 

Any help would be appreciated

Thanks
DD

[pwrgreg007]

I'm not sure about at startup, but this happens to me when I hit the update link (green circle) at the top. Firefox updates, all the tabs pop up (about 16 in two different instances/windows), then they take several minutes to load. Here's what Task Manager shows:

It's thrashing the hard drive and doing nothing on the network. It appears that FF is disk-bound. What is it doing? I don't want a load from disk cache, I want it to hit the network and refresh all the pages on the tabs! Maybe it's my computer. How do I determine what's happening here?

System Information: