After updating to DisplayFusion 12 Beta 8, I noticed that Firefox has become extremely slow, especially with network access.
- Up to Beta 7, there were no issues.
- With Beta 8, Firefox’s network performance is heavily impacted.
- If I exit DisplayFusion’s background process, Firefox runs normally without any problems.
Has anyone else experienced this behavior?
In the past, there was a known compatibility issue between DisplayFusion and ESET, and I’m wondering if this might be a similar case.
Additional Information:
- ESET version: 19.0.14.0
- Windows version: 11 25H2 (26200.7309 Preview)
- Firefox version: 145.0.2
- Disabling ESET protection while running DisplayFusion did not resolve the issue.
Any feedback or confirmation from others encountering the same problem would be appreciated.

It seems the issue has been resolved with Beta 9. Thank you.