wording

extension/ui/pages/help.html

@@ -232,7 +232,7 @@
 					<li>
 						<span class="option">maximum idle time (ms)</span>
 						<p>Specify the maximum delay of time to wait for deferred images. You can increase this value if for example the
-							network conditions are degraded. You can also decrease this value otherwise.</p>
+							network or system conditions are degraded. You can also decrease this value otherwise.</p>
 					</li>
 
 					<li>