Ways to detect Page Change:

• Use an explicit wait with an expected condition 
• While(self.driver.getCurrentUrl() != nextPageUrl) :sleep(2) #if url change
• By checking Title tag if it changes

CustomTracking
Using Console
localStorage.a=0;

TamperMonkey
//for the whole domain
localStorage.a++;

Python: [selq]

#For explicit wait 
WebDriverWait(b, 5).until(
  EC.presence_of_element_located((By.CSS_SELECTOR,'#s')))
WebDriverWait(b, 5).until(
  EC.invisibility_of_element_located((By.CSS_SELECTOR,'#s')))

from selq import this
window_changed=bes('return +localStorage.a')
def iswc():
    global window_changed
    a=bes('return +localStorage.a')
    for i in range(10):
        if window_changed            return True
        sleep(2)
    alert('Hey Baby')
    exit()