Pyinstaller multiple py & chrome instances

[orbar1]

Hey guys,
I have this gui.py file with tkinter for gui with buttons to call functions and the program when ran normally - works fine = gui window is opening with an empy chrome browser until I click a button that triggers a function and it moves to the right pages.

However when I run "pyinstaller --onefile gui.py" (with or without --windowed) and run the exe, it keeps opening infinite instances both of the gui and browser.

Googling a bit I saw this:

if name == 'main':
multiprocessing.freeze_support()
mainfunc()

so I just wrapped my logic in gui.py with mainfunc(), now when using pyinstaller, it really stops opening multiple gui instances but it keeps opening infinite chrome instances, pretty much confused as why this behavior happens with pyinstaller but not when I simply run my code..

Any ideas and help would be super appreciated.