Flex Proxy

This depends directly on how the proxy server works. Some of them do not require any authorization at all, others require username and password for access, and others require you to view ads and so on. Which option will be used depends directly on the service that provides access to the proxy server.

You need to go to "Settings", under "Sharing" select "VPN". And there you can either enter the connection parameters manually (address, port number, username and password), or choose a program that automatically connects the user to the proxy (free applications of this type can be found in Google Play).

To enable responsive design mode in Firefox using Selenium, you can use the webdriver.FirefoxOptions() class and set the desired options for responsive design. Here's an example in Python:

from selenium import webdriver

# Create Firefox options
firefox_options = webdriver.FirefoxOptions()

# Enable responsive design mode
firefox_options.add_argument('--start-maximized')  # Start the browser in maximized mode
firefox_options.add_argument('--width=800')  # Set the initial width
firefox_options.add_argument('--height=600')  # Set the initial height

# Create the WebDriver instance with the specified options
driver = webdriver.Firefox(options=firefox_options)

# Navigate to a website
driver.get('https://example.com')

# Continue with your Selenium script...

# Close the browser when done
driver.quit()

In this example:

• --start-maximized: Opens the browser window in maximized mode.
• --width=800: Sets the initial width of the browser window to 800 pixels.
• --height=600: Sets the initial height of the browser window to 600 pixels.

You can adjust the width and height values based on your specific requirements.

Please note that the responsiveness of the design is primarily determined by the CSS media queries and how the website is designed to handle different viewport sizes. Changing the browser window size using Selenium does not necessarily trigger responsive behavior unless the website's CSS is designed to respond to changes in viewport size.

If you want to simulate specific devices with predefined sizes, you can use the mobile_emulation capability in Chrome. However, this is specific to Chrome and not available in Firefox.

from selenium import webdriver

chrome_options = webdriver.ChromeOptions()
chrome_options.add_experimental_option('mobileEmulation', {'deviceName': 'iPhone X'})

driver = webdriver.Chrome(chrome_options=chrome_options)
driver.get('https://example.com')

# Continue with your Selenium script...

driver.quit()

Keep in mind that responsive design testing is often more effectively done using tools built into browsers (e.g., Chrome DevTools) or specialized testing frameworks rather than relying solely on Selenium.

To connect to the Internet via a proxy server, you need to configure your browser or operating system to use the proxy server. Here's a general guide for setting up a proxy server using a web browser:

1. Open your web browser.

2. Access the browser settings or preferences:
- On Windows: Click the three-dot menu in the top-right corner and select "Settings."
- On macOS: Click the Apple menu in the top-left corner, select "System Preferences," and click "Network."
- On Linux: Click the menu button in the top-right corner, select "Settings," and click "Network."
- On Android: Open the "Settings" app and tap "Network & internet."
- On iOS: Open the "Settings" app and tap "Wi-Fi."

3. Locate the proxy settings:
- On Windows: Under "Network," click "Proxy settings."
- On macOS: Click the "Advanced" button and go to the "Proxies" tab.
- On Linux: Click the "+" button to add a new proxy.
- On Android: Tap "Private DNS" and "Static IP address" under "Advanced options."
- On iOS: Tap "Configure Proxy" under the active Wi-Fi network.

4. Enter the proxy server address, port, and authentication details (if required):
- Proxy server address: Enter the domain name or IP address of the proxy server (e.g., http://proxy-server).
- Port: Enter the port number used by the proxy server (e.g., 8080).
- Username and Password (optional): If the proxy server requires authentication, enter the username and password provided by the proxy server provider.

5. Save the proxy settings and restart the browser.

In the browser settings, select "Open Browser Settings" and then, finding the "Advanced" button, go to the "System" section. Click on the button "Open proxy server settings for computer" and in the section "Manual proxy settings" move the slider to the position "On". Now enter in the appropriate fields the IP address, proxy, port and click "Save".