Tor browser does not enable CFG on Windows.
Control Flow Guard (MS docs) is a mitigation measure that blocks certain ways of redirecting the control flow. It is an example of a control flow integrity mitigation. I did not check if the binary had other control flow integrity measures enabled as that would require reviewing the build process or disassembling the binary.
I verified that Tor Browser does not support support CFG while Firefox does using the dumpbin
tool.
The advantage of enabling CFG even if other CFI measures are already in place is that it allows for interoperability with OS libraries - it allows OS libraries to verify any callbacks that point inside Tor Browser modules are valid.