Update to the latest version Restart Firefox Disable resource consuming extensions and themes Hide intrusive content Check Firefox hardware acceleration Check Flash hardware acceleration Use fewer tabs Close other applications Delete corrupt content-prefs.sqlite file Refresh Firefox Use additional troubleshooting tools

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Hi napecex574, You can use Firefox's built-in Task Manager to help determine resource consuming aspects of your browser: Select the 3-bar Menu button Select More Select Task Manager

You can also set Firefox to suspend tabs when your memory diminishes to 400 MB:

Type about:config in the address bar and press Enter Select "I Accept The Risk!" in the search bar at the top enter browser.tabs.unloadOnLowMemory double-click the entry to toggle it to True.

You can check some of the helpful fixes here:

Quick fixes if your Firefox slows down https://support.mozilla.org/en-US/kb/quick-fixes-if-your-firefox-slows-down

And there is also this extension which might help: Tab Suspender https://addons.mozilla.org/en-US/firefox/addon/ff-tab-suspender/

You need to Restart the browser for the config change to take effect.

what is hide intrusive, a setting? what's the difference between "use recommended performance settings" and "use hardare acceleration when available"?

i have heard from someon on a different forum that he was able to open 75+ forum with no crash ever happening.

and i'm not using any heavy add-ons and no themes

what and where is flash acceleration?

Is there no way to turn off tabs that aren't being used?

"Use recommended performance settings" allows Firefox to tailor the settings which will work best with your computer.

"Use hardware acceleration when available" This setting allows Firefox to use your computer's graphics processor, if possible, instead of the main processor, to display graphics-heavy web content such as videos or games. This frees up resources on your computer so it can run other applications, like Firefox, faster. This box is checked by default but the feature isn't available for all graphics processors. You must restart Firefox after changing this setting, before it will take effect.

Is your graphics driver up-to-date?

Are the tabs which are not being used consuming too much memory?

My_Cheese_Is_Slippin' said

"Use recommended performance settings" allows Firefox to tailor the settings which will work best with your computer. "Use hardware acceleration when available" This setting allows Firefox to use your computer's graphics processor, if possible, instead of the main processor, to display graphics-heavy web content such as videos or games. This frees up resources on your computer so it can run other applications, like Firefox, faster. This box is checked by default but the feature isn't available for all graphics processors. You must restart Firefox after changing this setting, before it will take effect. Is your graphics driver up-to-date? Are the tabs which are not being used consuming too much memory?

i think so, some of them are tab from youtube, reddit and such. i always update my drivers

Try starting Firefox in it's Safe Mode to see if the problem persists.

Safe Mode temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes) that might be causing problems.

With Firefox open: Select Menu Select Help Select Restart With Add-ons Disabled On the dialog select Restart On the next dialog select Start In Safe Mode (Do Not select Refresh)

With Firefox closed: Press and hold the Shift (in Mac: Option) key Launch Firefox On the dialog select Start In Safe Mode (Do Not select Refresh)

(Your Bookmarks Toolbar will be turned off. Right-click on the Toolbar and select Bookmarks Toolbar to display it again.) ______________________________________________________

To quit Safe Mode: Select Menu Select Help Select Restart With Add-ons Enabled

Or Exit Firefox. _______________________________________________________

Also, did Crash Reporter appear? Did you submit the reports? You can also post the reports here. See this article: Mozilla Crash Reporter https://support.mozilla.org/en-US/kb/mozillacrashreporter