This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox 45.0 is running very slow and lagging. Using too much RAM Windows 10

  • 1 phendula
  • 1 inayo le ngxaki
  • 6 views
  • Impendulo yokugqibela ngu FredMcD

more options

Firefox 45.0 very slow startup and running very slow and lagging. It uses too much RAM Windows 10. Current Laptop Specs 250 GB SSD 8 GB Intel I5 Processor. Uninstalled Firefox completely and Install Firefox from beginning still no fix only have 3 add-on and only one add on is running.


Main Process

WARNING: the following values are negative or unreasonably large.

   explicit/gfx
   explicit/gfx/heap-textures
   explicit/(18 tiny)
   explicit/(18 tiny)/heap-unclassified 

This indicates a defect in one or more memory reporters. The invalid values are highlighted. Explicit Allocations

338.28 MB (100.0%) -- explicit ├──4,097.53 MB (1211.30%) -- gfx [?!] │ ├──4,096.00 MB (1210.85%) ── heap-textures [?!]

Firefox 45.0 very slow startup and running very slow and lagging. It uses too much RAM Windows 10. Current Laptop Specs 250 GB SSD 8 GB Intel I5 Processor. Uninstalled Firefox completely and Install Firefox from beginning still no fix only have 3 add-on and only one add on is running. Main Process WARNING: the following values are negative or unreasonably large. explicit/gfx explicit/gfx/heap-textures explicit/(18 tiny) explicit/(18 tiny)/heap-unclassified This indicates a defect in one or more memory reporters. The invalid values are highlighted. Explicit Allocations 338.28 MB (100.0%) -- explicit ├──4,097.53 MB (1211.30%) -- gfx [?!] │ ├──4,096.00 MB (1210.85%) ── heap-textures [?!]

All Replies (1)

more options

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options)
key, and then starting Firefox. Is the problem still there?


Start your Computer in safe mode with networking. Then start Firefox. Try Safe websites. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia


Firefox uses too much memory (RAM) - How to fix This article describes how to make Firefox use less memory to make it run faster and prevent crashes.

https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding