Q: safari 9.1 won't open web page

You may have a Safari extension or third party plug-in installed that's preventing web pages from loading.

From the Safari menu bar click Safari > Preferences then select the Extensions tab. If there are any extensions installed, uninstall one at a time then quit and relaunch Safari to test.

If it's not an extensions issue, try troubleshooting third party plug-ins.

Back to Safari > Preferences. This time select the Security tab. Deselect:  Allow plug-ins. Quit and relaunch Safari to test.

If that made a difference, instructions for troubleshooting plugins here.

Safari - Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues

Safari doesn't load a page or webpage items are missing

Safari/other browsers – Website not loading