Revised version (+login function, no need tampermonkey) : https://ahmadiham.id/post/auto-follow-strava/

Script Selenium Open Link in File List

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.chrome.options import Options
from webdriver_manager.chrome import ChromeDriverManager
import time

# Set up Chrome options
chrome_options = Options()
chrome_options.add_argument("--start-maximized")  # Optional: starts Chrome maximized

# Set up the Chrome driver
driver = webdriver.Chrome(service=Service(ChromeDriverManager().install()), options=chrome_options)

# Open the file containing URLs
with open('some-file.txt', 'r') as file:
    # Read all lines (URLs) from the file
    urls = file.readlines()

# Iterate through each URL
for url in urls:
    # Strip any whitespace (including newline characters)
    url = url.strip()
    
    # Open the URL in the Chrome browser
    driver.get(url)
    
    # Wait for 5 seconds before opening the next URL
    # You can adjust this delay as needed
    time.sleep(5)

print("All URLs have been opened.")

# Close the browser
driver.quit()

Referensi : https://poe.com/s/0zcB8ZKybx0Vc6FDhwVO

Script Tempermonkey Auto Click Follow Button

// ==UserScript==
// @name         FollowStrava
// @namespace    https://ahmadiham.id/
// @version      2020
// @description  Auto-follow Strava
// @author       https://t.me/dirut
// @match        *://www.strava.com/athletes/*
// @grant        none
// @run-at 		 document-idle
// ==/UserScript==

let tmbl = document.querySelectorAll('.follow');
tmbl.forEach(kTmbl => kTmbl.click())