Thank you, Malcom1...
This is my contention. If it saves bandwidth, then it's great. Of the 150 or more tabs I have open, most are on the other rows in Too Many Tabs. This keeps nearly-at-the-ready many sites I find interesting but end up loosing in the Bookmarks tool. I periodically cull or remove pages here and there from the some 40 tabs on Firefox's own tabbed bar.
The question is, to those who'd find it ghastly to have 150 tabs on hand, why cannot the user keep open as many tabs as desired? Maybe I could turn off images and deny placeholders, and jack up the page, but at least the URL will be there withou saying "Problem loading page", and, so on.
Also, when I fire up the browser, whether it's 15 tabs or 1000 tabs, why do they all need to call home? Just refresh the tab's URL or don't obscure it due to a failed connection. Just scrape or delete from RAM and free up RAM wasted on content the user is not looking at past a user-defined wipe time.
For the curious, I use (and, I'll eventually get around do donating to these):
-- Ad-Block Plus
-- Better Privacy
-- No Squint
There's a bunch of SHIT out there that doesn't deserve the light of day, and mscreants spoll things for many of us who just want to surf in peace.