This is a common question that people ask me... Well, I can say that your browser will never be secure because always can exist a 0-day exploit that could gain access to your operating system across your browser...

Everyday, people ask me...

 - "Recently, I've not installed anything but my PC was infected!!! What can I do?"

- "Well, I don't know...  Are your browser and your plugins updated at the last version?"

- "I don't know... How can I check it?"

I found out a website where you can test if your browser's plugins are updated for free. Only go to http://browserscan.rapid7.com/scanme

You will see something like that:


If you have some outdated plugin you will see something like that.