Safari DNS problem in Yosemite? Works, then slow death...

Safari 8.0 + Yosemite seems to have a problem. It will work for a while, then begins to fail to load and is unable to resolve top level domains -  "Safari Can't Find the Server ... [e.g. apple.com]"
Restarting Safari often resolves the issue for a while (minutes, hours?), then performance deteriorates until it finally gives up and generates the error. Chrome, on the same machine, does not suffer this problem.
17" Intel iMac, Safari 8.0, Yosemite, Exede broadband (satellite).
Anybody else see this issue and/or have a solution?
iMac (27-inch Mid 2011), OS X Yosemite (10.10)

Hi Phillip...
I'm not having issues with Facebook on either Safari or Chrome running Yosemite. Try maintenance for Safari.
Might be a cookies, cache, or extensions, issue.
From your Safari menu bar click Safari > Preferences then select the Privacy tab.
Click:   Remove All Website Data
Then delete the cache.
Open a Finder window. From the Finder menu bar click Go > Go to Folder
Type or copy paste the following
~/Library/Caches/com.apple.Safari/Cache.db
Click Go then move the Cache.db file to the Trash.
Quit and relaunch Safari to test.
If that doesn't help, troubleshoot Safari extensions.
From the Safari menu bar click Safari > Preferences then select the Extensions tab. Turn that OFF, quit and relaunch Safari to test.
If that helped, turn one extension on then quit and relaunch Safari to test until you find the incompatible extension then click uninstall.
If nothing above worked, restart your internet modem and router if you use one then try Facebook on Safari.

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