Mozilla Firefox, that demon of an internet browser, combines usability with accessibility when it comes to browsing on the internet. This is because Firefox adheres to the standards set forth by the World Wide Web Consortium, the regulatory board of the internet, even when it comes to websites that were programmed using Flash, which are also referred to as Flash sites. The development of
fast internet connections resulted in the boom of both the computer and the internet industry, which also caused the rapid development of Flash and web design.
With this, web designers found it harder to check on cross-referencing, which is standardizing websites to work with most internet browsers, but this workload was placed in the hands of browser developers themselves because of the voluminous outpour of websites popping here and there which do not follow such standards. Because Flash makes use of
digital images, animations, or movies, Firefox oftentimes have problems accessing a Flash site.
This problem also happens with Microsoft's Internet Explorer, but the only thing you need to do is either re-install the internet browser itself, or reinstall Flash on your computer. This way, you'll be on your way to seamlessly accessing and browsing through those Flash sites on the internet.
Mozilla Firefox is also safer and more secure than IE, so I'd suggest you use this as your default internet browser.