You must allow pop-ups for browser to purchase the addon.
1. Chrome
- Click the three horizontal dots button on the browser toolbar.
- Select Settings.
- From the left, click on Privacy and Security.
- Under Privacy and Security click on Site Settings.
- In the Pop-ups and redirects section, turn the setting to Allowed.
2. Firefox
You can uncheck the Block Pop up windows Under Firefox Orange Button > Options > Options > Content Tab. For more details, please click Here
3. Safari
- Open Safari, then click Safari > Preferences in the top left of the browser window.
- Select the Security tab in the top menue and uncheck the Block pop-up windows option.
4. Microsoft Edge
- Open the Microsoft Edge browser and click the three horizontal dots in the top right of the browser window.
- Click Settings
- Click Cookies and site permissions
- Scroll down and click Pop-ups and redirects
- Turn the setting for Block (recommended) to the on position.