Clean unnecessary localization to save space

[mecho]

Capricorny I have upgraded 80% of the packages available in Knoppix and I have installed at least 50 new applications which I need. My knoppix installation is 8 months old and I have 1.5 GB of free space on 4 GB flash drive, and its all thanks to BleachBit.
I can tell you why it is working so well. Almost 30% of the size of most applications are localization files which are totally unnecessary if you do not use other languages beside english, so whenever I upgrade a package and I cut off the localization files it takes very little space of the persistent image. I have locked some packages which I do not use much and I do not need them upgraded - such as the whole open office, the printing system and all libs and apps related to them.
BleachBit also has a whitelist and any directory marked in the whitelist will not get cleaned up. You might want to give it a try. I dont think I will run out of space any time soon, because any upgrade on already upgraded package doesn't take any space

[mecho]

@Utu

Regarding Firefox/Iceweasel urlclassifier3.sqlite - I keep it 30 Kb. I wrote in some of my other post a way to disable the growth of urlclassifier3.sqlite, but it requires alternative security measure.
urlclassifier3.sqlite is a file used by Firefox to keep a database of malicious sites containing phishing and adware. It can be easily disabled, but you will need alternative protection. The best way so far is using opendns DNS servers. Once you subscribe with them you can choose what kind of protection you want for your browser.Phishing sites are blocked by default with opendns. So thir security is way better then using urlclassifier3.sqlite and you have the added bonus of getting rid of this ever growing file. OpenDNS service is totally free