Why does FIrefox use a lot of RAM on Linux?

Question

linux

There is a problem when using FIrefox or Chrome, after a while the computer completely freezes due to the fact that the browser uses all the available frames.
When opening FIrefox, I noticed that 400MB is immediately allocated when opening 3-4 tabs, the frame load reaches 3.7 GB and the computer freezes and hard-reset only helps.
Here is what I tried to do

1. Turned off all plugins
   
2. Unchecked ""Use hardware acceleration when available" and made more thing to optimize Firefox performance"
   
3. Increased vm.swappiness=10
   
4. Updated kernel to 4.13
   
5. Dug in the FIrefox settings to optimize the browser
   

In the end, nothing helped . I
use Ubuntu 16.04 Dual Boot with Windows 10

Answer 1

The same garbage, turned on the swap, everything worked fine
Maybe you have the same reason

Answer 2

There is no swap, it works fine.

Answer 3

show what you screwed up / optimized?
about: support or "help> information for solving problems"
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