How to Fix Chrome Extensions Slowing Down Browsing

What Causes This?

Chrome extensions run inside the browser and can use CPU, memory, disk, and network resources while pages load. A poorly coded, outdated, or conflicting extension can slow down tab performance, delay page rendering, or make Chrome feel unresponsive. The problem is often worse when you have many extensions installed, or when multiple extensions try to modify the same sites.

Common Symptoms

• Pages take much longer than usual to load in Chrome
• Chrome uses high CPU or memory even with only a few tabs open
• Scrolling, typing, or switching tabs feels laggy
• Chrome starts normally but becomes slower after a few minutes
• Disabling one extension suddenly makes browsing feel normal again

How to Fix It Manually

1. Check whether an extension is using too many resources

   1. Open Chrome.
   2. Press Shift + Esc to open Chrome’s built-in Task Manager.
   3. Click the Memory footprint, CPU, or Network column to sort usage.
   4. Look for an extension, tab, or extension-related process using unusually high resources, especially when you are not actively using it.

2. Test Chrome without extensions

   1. In Chrome, click the three-dot menu.
   2. Go to Extensions > Manage Extensions.
   3. Turn off every extension using the toggle for each one.
   4. Close all Chrome windows, then open Chrome again and browse a few sites.
   5. If Chrome feels faster, one or more extensions are likely causing the slowdown.

3. Find the problematic extension

   1. Open chrome://extensions/.
   2. Re-enable one extension at a time.
   3. After enabling each one, browse normally for a minute or two.
   4. When the slowdown returns, the last extension you enabled is the most likely cause.
   5. If the issue only appears when two specific extensions are enabled together, you may be dealing with an extension conflict.

4. Update or remove the extension

   1. On the Extensions page, identify the extension causing the problem.
   2. Click Remove if you do not need it.
   3. If you want to keep it, open its Details page and check its Chrome Web Store listing for recent support notes or reported issues.
   4. If the extension is from a third party outside the Web Store, make sure you trust the source before keeping it installed.

5. Clear Chrome’s cached data

   1. Press Ctrl + Shift + Delete on Windows or Linux, or Command + Shift + Delete on macOS.
   2. Set Time range to All time.
   3. Check Cached images and files.
   4. Click Delete data.
   5. Restart Chrome and test browsing speed again.

6. Check for background strain in your operating system

   1. On Windows, open Task Manager with Ctrl + Shift + Esc.
   2. On macOS, open Activity Monitor from Applications > Utilities or use Spotlight.
   3. On Ubuntu or Fedora, open System Monitor.
   4. Look for high CPU or memory use from Google Chrome or other apps running at the same time.
   5. Close unnecessary background programs that are competing for RAM or CPU.

7. Reset Chrome settings if the problem continues

   1. In Chrome, open Settings.
   2. Open Reset settings.
   3. Select Restore settings to their original defaults.
   4. Confirm the reset.
   5. Reinstall only the extensions you actually need.

Fix It Automatically with Kudu

Kudu cannot identify which Chrome extension is slow on its own, but it can help you check whether system load is making Chrome feel worse. Use Performance Monitor to see if Chrome or another process is consuming too much CPU or memory while you browse, and use System Cleaner to clear supported browser caches for review if you want to rule out stale cached data.

Download Kudu Free →