Middleclick in Linux’ Firefox tries to open the page your clipboard links to

If you’re using *nix and you’ve found this middle-click behaviour annoying, change Firefox’s middlemouse.contentLoadURL about:config option to false.
Big thanks to Ayman Hourieh for the tip.

Clearing DNS cache – regex part 2

Trust me. We’re still dealing with regexes – just in a roundabout (and vaguely practical) way. This is a pretty comprehensive listing of how to go about flushing DNS caches while using regexes to show where similar methods deviate.
Why do we want to clear DNS caches exactly?
There are a number of reasons to clear DNS [...]