about-addons-memory shows 66MB total but Task Manager shows 500MB

[dljohnst]

How to I interpret this disparity between what the addon says (66MB) and the Windows 7 Task Manager says (500MB)?
I was trying to use this to identify why Firefox was consuming so much memory where it generally increases up to a GB where on my laptop FF becomes unbearably slow.
Running FF 52.3.0 (32-bit) on Windows 7 on a 32-bit single-core 1.6GHz laptop.
Appreciate any comments on this. Thanks.
Appreciate possible reply to [email protected] if possible, otherwise I will try to check back on GitHub Issues. Thanks again.

[yfdyh000]

use about:memory to dump complete usage.