What is the Mixed Content Error?

The "Mixed Content" error occurs when a web page served over HTTPS includes assets loaded over HTTP. Browsers block this insecure content to protect users. Examples of such assets include images, scripts, or CSS files loaded via HTTP.

Why This Error Happens

This issue arises when a secure webpage (HTTPS) requests resources from non-secure sources (HTTP). As a result, browsers either block or warn users about the insecure content.

Types of Mixed Content

1. Passive Mixed Content

Passive mixed content includes non-interactive resources such as images, videos, or audio files loaded over HTTP. Although less risky, it can still expose users to tracking or tampering risks.

Examples:

• Images loaded via HTTP
• Videos or audio files with insecure links

Browser Behavior: Google Chrome attempts to upgrade passive content to HTTPS but blocks it if unavailable. Mozilla Firefox allows passive mixed content but warns users.

2. Active Mixed Content

Active mixed content includes interactive elements such as scripts or iframes. This type is more dangerous as it allows attackers to manipulate the entire page or redirect users to malicious sites.

Examples:

• JavaScript files loaded via HTTP
• CSS files or iframes from non-secure sources

Browser Behavior: Most browsers block active mixed content entirely to prevent potential exploits.

How to Resolve the Mixed Content Error

To resolve this error, ensure all HTTP assets are upgraded to HTTPS. Follow these steps for WordPress and non-WordPress websites:

Fixing Mixed Content on WordPress

1. Upgrade Website URL to HTTPS: Navigate to Settings > General Settings in your WordPress dashboard and update your site and WordPress URLs to HTTPS.
2. Use Insecure Content Fixer Plugin: This plugin automatically upgrades insecure content to HTTPS. It offers multiple levels of customization.
3. Use Really Simple SSL Plugin: This one-click plugin ensures your entire website serves over HTTPS and helps manage SSL certificates.
4. Enable VergeCloud CDN: VergeCloud’s CDN service automatically rewrites HTTP links to HTTPS, ensuring a secure browsing experience.

Fixing Mixed Content on Non-WordPress Sites

For websites without a CMS, manually identify and replace HTTP resources with HTTPS links. Use tools like WhyNoPadlocks to locate insecure links.

Tip: VergeCloud’s CDN has a feature called "Rewrite Files Based on HTTPS", which automatically converts all assets to HTTPS.

How to Enable Mixed Content in Browsers

Sometimes, you may need to access a website with mixed content. Follow these steps to enable mixed content temporarily:

Microsoft Edge

1. Go to Settings > Cookies and Site Permissions.
2. Enable Insecure Content and add the URL of the website.

Google Chrome

1. Click the padlock icon in the address bar.
2. Choose Site Settings and enable Insecure Content.

Mozilla Firefox

1. Click the padlock icon in the address bar.
2. Click Disable protection for now to temporarily access the site.

Safari

Safari blocks all mixed content by default. To access sites with mixed content, use another browser.

Does Mixed Content Impact SEO?

Yes, mixed content negatively affects your website's SEO. Secure websites rank higher on search engines, and mixed content warnings can drive users away, increasing bounce rates and reducing engagement. Fixing mixed content ensures better user experience and improved SEO rankings.

Considerations

• Always use VergeCloud’s free SSL certificate to ensure secure connections.
• Ensure all resources (images, scripts, CSS) are served over HTTPS.
• Test your website for mixed content using browser developer tools or external checkers.
• Fix active mixed content issues immediately, as they pose significant security risks.