An error occurred in Firefox Profiler: RangeError: invalid digits value: NaN.

[SeseMueller]

Using the Firefox Profiler and changing the time frame to a duration of 0 (so where start=end) while hovering process power seems to be causing this.

Steps to reproduce:

1. Open Profiler on a measurement
2. Start selection by clicking somewhere on the process power graph
3. Move mouse back to where selection started
4. 

Firefox Version: 130.0 as well as 130.0.1; reproduced on both
Architecture: aarch64 (Apple Silicon)

[julienw]

Thanks a lot, I can indeed reproduce, I'm working on a patch now!