I’ve been using Firefox for a long time, and have found it to be the most capable, extensible and secure browser of all of the options available. Do yourself a favor and switch or upgrade today, it’s free, no strings attached.
Their newest version includes some great features such as malware and phishing protection. They’ve also made some improvements to their already great tabbed browsing interface that should make it even easier to manage many open pages.
You can download it here: