From Reddit user soulp4tch:
The presenter said if she had a bigger laptop we could see more of the website...
Reopen it later after you finally remember what you needed. Forget why you had your old tab open. Close tab. Remember that you actually had something important opened on your old tab. Curse yourself. Give up and go for a coffee break. /day
I'm pretty sure this is available already in China.
As always, you know where to go when you just can't unfriend them.