Easy Way Increase Mozilla Firefox

Create file text with name "user.js"

copas below content (blue color) to user.js:

# Mozilla User Preferences
user_pref("accessibility.typeaheadfind.flashBar", 0);
user_pref("browser.bookmarks.restore_default_bookmarks", false);
user_pref("browser.cache.disk.capacity", 358400);
user_pref("browser.cache.disk.filesystem_reported", 1);
user_pref("browser.cache.disk.smart_size.first_run", false);
user_pref("browser.cache.disk.smart_size.use_old_max", false);
user_pref("browser.cache.frecency_experiment", 2);
user_pref("browser.cache.memory.capacity", 65536);
user_pref("browser.cache.use_new_backend", 1);
user_pref("browser.chrome.favicons", false);
user_pref("browser.customizemode.tip0.shown", true);
user_pref("browser.display.show_image_placeholders", false);
user_pref("browser.download.importedFromSqlite", true);
user_pref("browser.download.panel.shown", true);
user_pref("browser.pagethumbnails.storage_version", 3);
user_pref("browser.places.smartBookmarksVersion", 7);
user_pref("browser.preferences.advanced.selectedTabIndex", 1);
user_pref("browser.reader.detectedFirstArticle", true);
user_pref("browser.rights.3.shown", true);
user_pref("browser.slowStartup.averageTime", 1216);
user_pref("browser.slowStartup.samples", 3);
user_pref("browser.syncPromoViewsLeftMap", "{\"passwords\":0}");
user_pref("browser.tabs.animate", false);
user_pref("browser.tabs.warnOnClose", false);
user_pref("browser.turbo.enabled", true);
user_pref("browser.usedOnWindows10", true);
user_pref("content.interrupt.parsing", true);
user_pref("content.max.tokenizing.time", 2250000);
user_pref("content.notify.backoffcount", 5);
user_pref("content.notify.interval", 750000);
user_pref("content.notify.ontimer", true);
user_pref("content.switch.threshold", 750000);
user_pref("experiments.activeExperiment", false);
user_pref("font.internaluseonly.changed", false);
user_pref("general.warnOnAboutConfig", false);
user_pref("network.cookie.prefsMigrated", true);
user_pref("network.dns.disableIPv6", true);
user_pref("network.http.max-connections", 48);
user_pref("network.http.max-connections-per-server", 16);
user_pref("network.http.max-persistent-connections-per-proxy", 16);
user_pref("network.http.max-persistent-connections-per-server", 8);
user_pref("network.http.pipelining", true);
user_pref("network.http.pipelining.aggressive", true);
user_pref("network.http.pipelining.maxrequests", 8);
user_pref("network.http.pipelining.ssl", true);
user_pref("network.http.proxy.pipelining", true);
user_pref("network.http.request.max-start-delay", 0);
user_pref("network.predictor.cleaned-up", true);
user_pref("nglayout.initialpaint.delay", 0);
user_pref("ui.submenuDelay", 0);
user_pref("browser.turbo.enabled", true);
user_pref("browser.chrome.favicons", false);
user_pref("browser.urlbar.autocomplete.enabled", true);
user_pref("plugin.expose_full_path", true);

copy to folder Mozilla Firefox profiles.

Where is Firefox Profiles folder?

Win+R

type %appdata%\mozilla\firefox\Profiles

will show you folder like "xxxxxxxx.default"

open that folder, paste user.js, if already have user.js, overwrite.

That's All.