On: Why are browsers so slow?

[21echoes]

Mac El Capitan, FirefoxDeveloperEdition (which iirc is basically equivalent to Firefox Beta), not many addons (Tab Groups, uBlock Origin, No More 404s). I can screenshot my Activity Monitor if that'd help?

[jdright → 21echoes]

At this exactly time I have 27 tabs, this is the memory usage:

  Image	PID	Hard Faults/sec	Commit (KB)	Working Set (KB)	Shareable (KB)	Private (KB)
  firefox.exe	10604	0	1,529,308	1,491,692	           62,348	1,429,344

I'm on Windows 7, 39 days and 5 hours up time.

This Firefox instance is running since: 8:05:29 AM 05/12/2016

Firefox 50 (with a pending update).

Also, I see the process as a 32-bits image but I was sure it was 64-bits, will need to check on this.

And I have only: Facebook Ads Block, Ghostery and uBlock Origin.

So being Windows 7 and probably an 32bits Firefox install may cause all this difference?