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Firefox userChrome.js scripts

minimize-memory.uc.js (tested on Firefox 124.0.2)

Automatically frees browser memory when needed. The function is the same as clicking the Minimize memory usage button on the about:memory tab.

Default parameters (edit them as you see fit):

const threshold = 1000;      // script is activated only when Firefox uses (megabytes) or more RAM
const minz_limit = 500;      // minimize memory when relative RAM consumption exceeds (megabytes)
const poll_interval = 30000; // check RAM consumption value every (milliseconds)
const poll_number = 3;       // how many RAM consumption values to aggregate for decision
// must be less than poll_interval
const cooldown_time = 5000;  // give (milliseconds) for RAM level to stalilize after minimizing
const debug_beep = true;     // sound beep when memory is cleared
const beep_time = 0.1;       // beep duration (seconds)
const round_mb = 20;         // round RAM values to (megabytes)

How to use

Preparation:

xiaoxiaoflood's method

  1. Unpack firefox.zip into Firefox installation folder.
  2. Unpack chrome.zip into your Firefox profile chrome subfolder.

Installation:

  1. Place minimize-memory.uc.js into your Firefox profile chrome subfolder.
  2. Restart Firefox, you should have the button to manage scripts with Minimize Memory Usage script already registered there. Make sure script is activated (have check mark).