Kill the amount of RAM Firefox uses for it's cache feature
Here's how to fix it:
1. type “about: config” (no quotes) in the browser.
2. Find browser.sessionhistory.max_total_viewer
2. set it's value to 0
Increase the Firefox loads pages
1.Type “about: config” into the address bar and hit return.
Normally the browser will make it to the web page at a time.
When you enable it
speeds up page loading.
2. Alter the entries as follows:
Set “network.http.pipelining” to “true”
Set “network.http.proxy.pipelining” to “true”
Set “network.http.pipelining.maxrequests” to some number like 30.
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Request at once.
3. Lastly right-click anywhere and select New-> Integer. Name it
“Nglayout.initialpaint.delay” and set its value to “0 ″.
It receives. If you are using a broadband connection
More options for your about: config (you might have to create some of
these entries by Right Click -> New–> Interger or String
network.dns.disableIPv6: set “false”
“Content.notify.backoffcount”: set “5 ″
“Plugin.expose_full_path”: set “true”.
“Ui.submenuDelay”: set “0 ″ (zero)
Kill RAM usage to 10mb when FF is minimized
Firefox's RAM download min.
1. Open Firefox and go to the Address Bar. Type in about: config and then press Enter.
2. Right Click in the page and select New -> Boolean.
3. In the box that pops up enter config.trim_on_minimize. Press Enter.
4. Now select True and then press Enter.
5. Restart Firefox.
Source: https://habr.com/ru/post/378/