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Why does Firefox memory usage keep increasing?

Author

Eleanor Gray

Published Feb 17, 2026

Why does Firefox memory usage keep increasing?

For example, AdBlock Plus often causes Firefox to increase memory usage significantly. The reason is that it injects large style sheets into every frame.

Likewise, people ask, how do I stop Firefox from using so much memory?

Table of Contents

  1. Update to the latest version.
  2. Restart Firefox.
  3. Restart your computer.
  4. Disable resource consuming extensions and themes.
  5. Hide intrusive content.
  6. Check Flash hardware acceleration.
  7. Use fewer tabs.
  8. Check Firefox hardware acceleration.

Likewise, why is my browser taking up so much memory? Certain extensions or websites may also leak memory and cause higher RAM usage over time. And, of course, the more tabs and extensions you have installed, open, and running, the more memory Chrome is going to use. So yes: Chrome uses a lot of RAM, but it does so with (mostly) good reason: your convenience.

One may also ask, why does RAM usage keeps increasing?

If the PC has been in extended continuous use memory leaks can occur from some programs (usually badly written ones) that mean used memory is not released for reuse. Over time this can then accumulate. Provided that after each reboot your memory usage drops to the same level, I wouldn't worry.

How do I reduce my browser memory usage?

What you can do if your browser uses too much Memory

  1. Option 1: Install more RAM.
  2. Option 2: limit your browsing.
  3. Option 3: check installed browser extensions.

Does Firefox use more memory than Chrome?

In Chrome, more more open tabs and extensions means more RAM usage, which in turn means a hit to performance. However, from my experience on both a Mac and Windows 10 machine, Firefox actually uses more RAM than Chrome, meaning it takes fewer tabs and windows before it starts digging into your performance.

Why does Firefox have so many processes?

Recent versions of Firefox have a number of content rendering processes (it might be one per tab at first, but as the number of tabs grows, each process expands to cover multiple tabs) in addition to the main thread and another one dedicated to addons (which should show up as “webextensions” in the task manager).

Which browser uses least memory?

For this reason, Opera lands the first place as the browser that uses the least amount of PC memory while UR takes the second place. Just a few MB less of system resources used can have a big impact.

How much memory usage is too much?

8GB is perfectly fine for most everyone out there - especially Office/Firefox/etc. Keep in mind too, Windows will cache some memory as well, so if you're just doing a quick glance to check it it may only report 25% free but it's got 30% cached.

How do I fix high memory?

☘? How do I fix high memory usage Windows 10?
  1. Close unnecessary programs.
  2. Disable startup programs.
  3. Disable Superfetch service.
  4. Increase virtual memory.
  5. Set Registry Hack.
  6. Defragment hard drives.
  7. Methods suitable for software problems.
  8. Virus or antivirus.

Why does my RAM keep filling up Mac?

Make sure you have lots of free disk space

If you are running out of RAM your Mac's drive can be used as virtual memory - so free up some storage space if you are running out of RAM. The recommendation is to keep 20% of your drive space free. You could delete large unused files, old downloads, and old apps.

How do you use a RAMMap tool?

Launch RAMMap and it displays your RAM details in a tabbed interface. There's a lot of jargon here, but a good place to start is by looking at the “Active” column, which details memory which is currently in use, then scanning down the list of categories to see which is consuming the most.

Can adding more RAM make Internet browsing faster?

While RAM will help the Web browser run, it won't have a direct impact on Internet speed. Whether or not an upgrade in RAM will make the browser work better depends on how much memory is already in the system. If you already have more than enough memory to run the browser, an upgrade will have little to no effect.

How much memory can a browser use?

The amount of javascript, the plugins they require (like flash) make some pages really heavy. It's quite common nowadays that the browser becomes the heaviest program launched, with an average memory usage around 300-400mb.

Why is Chrome taking so much memory on my phone?

Since Chrome takes over the function of Android System Webview on Nougat and above, it's possible that it's still being utilized when other apps are accessing the web, which would lead to an increase in cached data. The temp files are probably the cache files.

Why is my laptop using so much memory?

If your RAM use is high and your PC is running slowly, an app may be the cause of the problem. Press Ctrl+Shift+Esc to open Task Manager and then, on the Processes tab, check to see how much memory Runtime Broker is using. If its using more than 15% of your memory, you probably have an issue with an app on your PC.

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Why does Firefox memory usage keep increasing?