macOS standard keyboard shortcuts for tabbing between windows
Your question seems to be conflating two things: cycling through tabs of a window and cycling through windows of an application.


⌘ cmd` grave and ⇧ shift⌘ cmd` grave will cycle through windows in an application.
This works for virtually all applications.
⌃ ctrl⇥ tab and ⇧ shift⌃ ctrl⇥ tab will cycle through tabs in a window.
This works for all applications which implement macOS Sierra's standard tab framework or implement this keyboard shortcut for their own tabs (which almost all tab-supporting apps do).