He has 21 tabs opened, by reducing it to 1 tab, he has saved 20/21 lots of memory, ~~ 95% saved. Assumptions: each tab uses same memory; no shared memory (or s

He has 21 tabs opened, by reducing it to 1 tab, he has saved 20/21 lots of memory, ~~ 95% saved. Assumptions: each tab uses same memory; no shared memory (or shared memory equally divided between all tabs), every user has around 20 tabs open given the first 2 assumptions hold true. To me, the 95% is a magic number.