Some websites are just plain annoying—which is bad for a company’s reputation and bad for business. Check out this list to be sure you’re not guilty of any of these design blunders.

From the list:

1. Require a certain browser/plugin
It amazes me that some sites still depend on a certain browser, or at the very least offer their full range of features and accessibility on only one browser. For instance, I deal with two business-related sites at my job that depend on using Internet Explorer.

I suppose it’s understandable if the company makes that browser (such as Microsoft). However, in many cases it’s simply a fact that the web server or various related apps aren’t elegant enough to support the range of available web browsers out there.

Worst of all are the sites that don’t bother telling you they depend on a specific browser for best results, forcing you to guess (or to abandon your efforts to use the site entirely).

It’s the same for plugins. Being told that you have to install an Adobe plugin, for instance, can turn into a frustrating exercise. Some users may have locked-down browsers, to which they can’t add plugins. Chrome is usually the best of the bunch here, often already having the necessary additions. But for best results, avoid such requirements where possible.

2. Use a cumbersome URL
How can you spot an amateur website? The URL often gives it away. What works better: www.company.com or www.joeandbobstastyclamshack.com? Keep the URL short and snappy, especially for people who type it in manually. What’s worse? Using a hosted site with a link like www.hostingorg.com/joeandbobstastyclamshack.com. For this example I’d go with www.jbclamshack.com.