Problems with browser add-ons in Firefox, Chrome or Edge in online shops. The background and what you can do about it.

Common problems caused by Firefox add-ons in online shops

1. Checkboxes are not displayed / radio buttons are not clickable
   Cause: CSS or JavaScript blocked.

2. Button "Add to shopping cart" does not work
   Cause: Script for click events is blocked.

3. Cookie banner is not displayed / consent options are missing
   Cause: Consent blocker hides the entire banner.

4. Login fields are missing or cannot be filled in
   Cause: Scripts or styles for input fields blocked.

5. Captcha is not loaded (e.g. Google reCAPTCHA is missing)
   Cause: Blocking of external Google scripts.

6. Payment options are not displayed (PayPal, Klarna, credit card)
   Cause: Payment scripts or iFrames blocked.

7. Payment data cannot be entered
   Cause: Input fields for credit card or SEPA invisible or deactivated.

8. Checkboxes in product filters do not respond
   Cause: Filter logic blocked via JavaScript.

9. Dropdown menus do not open
   Cause: Event handler for navigation blocked.

10. Page remains blocked by pop-up / close button does not work
    Cause: Overlay or X button is blocked by adblocker.

11. Texts or checkboxes are invisible (e.g. black background, black font)
    Cause: Dark mode or design add-ons change the display.

Problems with Firefox - the backgrounds and what you can do

Frequent causes are add-ons such as:

• Ad/script blockers: uBlock Origin, AdBlock Plus, AdGuard, Ghostery

• Security add-ons: NoScript, ScriptSafe

• Cookie/consent blockers: I Don't Care About Cookies, Consent-O-Matic

• Display add-ons: Dark Reader, Stylus

What you can do if you have problems with browser add-ons

1. Start Firefox without add-ons

   • Menu (☰) → Help → Restart with deactivated add-ons...

   • Check whether the checkboxes are now visible.

   • → If yes, one of the add-ons is blocked.

2. Check add-ons individually

   • Menu → Add-ons and Themes → Extensions.

   • Deactivate all extensions.

   • Then activate one after the other and test the store.

   • To find the add-on that is blocking the checkbox.

3. Delete cookies and cache

   • Menu → Settings → Privacy & security.

   • Under Cookies and website data → Remove data... click.

   • Reload the page.

4. Allow website scripts

   • In add-ons such as NoScript or uBlock, check whether scripts/CSS of the store page are blocked.

   • Add page as an exception if necessary.

5. Test new profile (if all else fails)

   • Enter about:profiles in the address bar.

   • Create a new profile and open the store there.

   • If it works there, it is due to old settings or add-ons.