Hi @jdaniel,
I understand the Mailpoet signup form is not appearing on your site in Firefox but works fine in other browsers.
This is likely caused by a conflict with your theme or with another plugin. Read more about plugin and theme conflicts in our Self-Service Guide.
**How to test for conflicts**
The best way to determine if the issue is being caused by a theme and/or plugin is to:
1. Temporarily switch your theme to Storefront or Twenty Twenty-Three theme.
2. Try to reproduce the problem: If the problem is resolved, it’s a theme conflict. If not, continue to the next steps.
3. Temporarily deactivate all plugins except WooCommerce. You can do this manually or use a plugin to help (see below for tools).
4. Try to reproduce the problem again. If the problem is resolved, it’s a plugin conflict. To figure out which plugin is causing the problem, continue to the next step.
5. Reactivate your other plugins one by one, testing after each, until you find the one causing conflict.
For more detailed instructions, check out How to test for plugin and theme conflicts.
**Tools to help with troubleshooting**
Meks Quick Plugin Disabler will remember what plugins you had active when you switch it back on.
You can clone your site to a staging environment and perform tests without modifying your live site or impacting customers. Many hosts provide staging facilities, so it’s worth checking in with them. It’s also possible to do it using the free WP Staging plugin.
