I don't know if this is a TGS or Scrollbar Search Marker bug. If TGS is enabled (regardless of setting "Show sidebar on" = "right side" / "left side"), SSM markers are no longer beside the scrollbar, but instead near the left window border. SSM does work when TGS is disabled.
Tested with Pale Moon 29.4.1 (64-bit) on Windows 10, TGS 1.1.0, SSM 1.0, with no other extensions installed.
I don't know if this is a TGS or Scrollbar Search Marker bug. If TGS is enabled (regardless of setting "Show sidebar on" = "right side" / "left side"), SSM markers are no longer beside the scrollbar, but instead near the left window border. SSM does work when TGS is disabled.
Tested with Pale Moon 29.4.1 (64-bit) on Windows 10, TGS 1.1.0, SSM 1.0, with no other extensions installed.