v4.0.0

• GoComics: implemented mechanisms to defeat the Bunny Shield challenge using a headless browser!
• Windows: browsers are queried in this order: Edge, Chrome, Brave, Firefox.
• Linux: browsers are queried in this order: firefox-esr, firefox, chromium, google-chrome (plus Flatpak).
• GoComics: in some cases, accessing GoComics via a VPN should now be possible!
• GoComics: the removal of the 403 block is impossible; change the server/IP.
• GoComics: the removal of the 429 limitation is impossible; just wait.
• CK: Fixed bugs related to Python and browsers receiving different contents.
• Overhauled the web-related error detection.
• Improved the feedback about what the app is trying to do.
• New, unknown bugs added by Gemini :)