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github.com/search causes 100% CPU usage on one thread #454

Description

@atbsi

When visiting the following page:
https://github.com/search?q=I%20still%20don%27t%20care%20about%20cookies&type=repositories

Observed Behavior:
The page loads normally, but shortly after, my CPU fan starts spinning up significantly.
Upon checking the system task manager, I can see that a single Firefox process is utilizing 100% of one CPU thread (or core).

Troubleshooting:
After disabling the "ClearURLs" browser extension, this high CPU usage issue no longer occurs. The CPU usage returns to normal.

Expected Behavior:
The page should load and operate without causing sustained high CPU usage on a single thread, even with common browser extensions enabled.

win 10 64
firefox 138.0.4

Activity

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