We often install many extensions in our browsers: ad blockers, webpage annotation tools, translation tools, productivity extensions…

They are convenient to use, but have you ever thought that these “small extensions” may also become dangerous entry points for your browser? Many people do not know how to properly conduct security checks and protection.

Here, we have prepared a super detailed guide for browser extension security checks and common Q&A.

I. Why Must Browser Extensions Be Checked Regularly?

1. Privacy Leakage

Some extensions read your browsing history, clipboard content, and cookie information, and may even upload them to third-party servers. You think you just installed a translation tool, but it may also quietly learn which websites you visit.

2. Malicious Code Injection

Some “free magic tools” secretly insert ad scripts into pages, add mining code, or even hijack redirect links.

3. Browser Fingerprint Exposure

The more extensions you install, the more unique your browser fingerprint becomes, making you easier to track. Many users now use tools like ToDetect browser-fingerprint checkers to confirm whether too many fingerprint characteristics are being exposed.

4. Account Security Risks

Some extensions intercept what you enter in forms, including usernames and passwords, making accounts easy to steal. More extensions do not mean more safety—regular browser security checks are truly necessary.

II. Browser Extension Security Check Methods (Practical Guide)

1. Check Extension Permissions

Open your browser’s extension management page and focus on whether the following permissions appear abnormal:

• “Read and modify all website data”
• “Run in the background”
• “Access clipboard”

If an extension that clearly does not need these permissions requests them anyway, be cautious.

2. Check Extension Source

• Is it from an official store?
• Is it made by a reputable developer?
• Has it been updated recently? Long-unmaintained extensions are more dangerous.
• Are user reviews abnormal, such as many low ratings or sudden spikes in positive reviews?

3. Use ToDetect for Browser Security Checks

ToDetect can check browser fingerprints and help determine whether high-risk fingerprint information is leaking. It’s particularly useful for users with many extensions, abnormal webpage behavior, or suspicion of being tracked.

4. Disable or Remove Suspicious Extensions

Be cautious if you encounter:

• You don’t remember when it was installed
• Its functionality overlaps with others
• Abnormal recent behavior or sudden CPU usage spikes
• Frequent pop-up ads when opening pages

The first rule of extension security: if you don't need it, don’t use it; if you don’t use it, delete it rather than disable it.

5. Perform Regular Browser Checkups

Clean your extensions once a month and run a fingerprint check. It not only speeds up your browser but also reduces privacy risks.

III. Common Questions About Browser Extension Checks

1. Are fewer browser extensions better?

Generally, yes. The more extensions and permissions you have, the more unique your fingerprint becomes and the easier you are to track. Users frequently logging into sensitive accounts are especially advised to keep a “light extension mode.”

2. Does using an ad blocker make browsing safer?

Mainstream ad blockers are generally safe, but you should verify that the source is legitimate. Some “counterfeit” versions may actually monitor user behavior.

3. How to tell if an extension is secretly uploading data?

If the following occurs, first check recently installed extensions:

• Your browser suddenly slows down
• Your fan spins at high speed without reason
• Your browser accesses strange websites on its own
• ToDetect shows a sudden increase in fingerprint exposure items

4. Can ToDetect replace antivirus software?

No. They serve different purposes. ToDetect checks privacy exposure and tracking fingerprints; antivirus software detects and removes malicious files. Using both provides better protection.

5. Do mobile browsers also need extension checks?

Yes, though mobile browsers usually have fewer extensions. Mobile browsers also carry fingerprints, and non-official extensions increase privacy risks.

Final Thoughts

Browser extensions are a double-edged sword—when used properly, they boost efficiency; when misused, they become sources of risk. It’s not that you shouldn’t install extensions, but you must use them “with caution.”

Whether you're a casual user or a heavy browser user, it’s recommended to occasionally use tools like ToDetect to check your privacy exposure. Sometimes an overlooked component can make you incredibly easy to track.