Symptoms
- One browser tab's memory usage keeps growing over time
- Browser eventually becomes unresponsive after being open for hours
- Restarting the browser temporarily fixes the slowdown
- Task Manager shows the browser process using several gigabytes
Likely causes
- CommonA specific website with a script that never releases memory properlySome web apps (especially ones with live updates or animations) are prone to this.
- CommonA buggy browser extension holding onto memoryExtensions that run constantly in the background are more likely to leak.
- CommonToo many tabs left open for extended periodsEven without a true leak, dozens of tabs add up to significant memory use over time.
- PossibleAn outdated browser version with a known memory bugBrowser updates frequently include memory-management fixes.
- PossibleHardware-accelerated video or animations running continuously in a background tabThis can keep memory and GPU usage elevated even when you're not looking at that tab.
What to do
- Use the browser's built-in task manager (e.g., Shift+Esc in Chrome) to find which tab is using the most memory.
- Close and reopen just that tab to see if memory drops back to normal.
- Update the browser to its latest version.
- Disable extensions one at a time to identify if one is responsible for the leak.
- Avoid leaving many tabs open indefinitely; bookmark pages you want to return to instead.
- Restart the browser periodically during long sessions if you notice gradual slowdown.
- Report the issue to the website or extension developer if you can reliably reproduce it.
- Consider a tab-suspension feature or extension that automatically frees memory from inactive tabs.
Tools and parts
- None required
When to call a pro
This is a software issue you can resolve yourself; professional help isn't necessary.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.