Use Alt+1 to Alt+9 Keys to open defined webpages on new tab (Alt+Shift+1 for current tab).
Exactly what I want.
It's 2025 now and I still use it. Couldn't find other addons better than this.

Thanks. I was looking foreward to this extension since speed dial was unavailable after the Quantum Update.

Thank you! Finally i can browse faster in FF57.
Note: After i save a new URL in Settings, i have to restart FF.