I use a lot of tabs, and in Firefox's configuration I have both:
When Firefox starts: Show my windows and tabs from last time
Don't load tabs until selected
PROBLEM: While I love this behavior, only one tab makes me sad: my Webmail tab, which shows "zero new email" until I remember and click on it so that it loads and starts fetching emails.
Is it possible to disable
Don't load tabs until selected for a particular website?