GNUzilla yog GNU version ntawm Mozilla suite, thiab GNU IceCat yog GNU version ntawm Firefox browser. Nws lub ntsiab kom zoo dua yog kev coj ncaj ncees: nws yog dawb software nkaus xwb. Thaum Firefox qhov chaws los ntawm Mozilla qhov project yog software dawb, lawv faib thiab pom zoo software nonfree li plug-ins thiab addons. Tsis tas li ntawd lawv daim ntawv tso cai ua lag luam tsim cov kev cai rau kev faib cov hloov pauv uas ua rau nws tsis yooj yim rau kev siv txoj kev ywj pheej 3.

Kev tiv thaiv ntiag tug nta:

• LibreJS: GNU LibreJS lub hom phiaj los daws qhov teeb meem JavaScript tau piav qhia hauv Richard Stallman tsab xov xwm JavaScript Trap.
• Https-Txhua qhov chaw: Extensions encrypts koj cov kev sib txuas lus nrog ntau lub vev xaib loj, ua rau koj qhov kev tshawb fawb muaj kev nyab xeeb dua.
• SpyBlock: Blocks tus kheej trackers thaum nyob rau hauv ib txwm browsing hom, thiab tag nrho cov neeg thib peb thov thaum nyob rau hauv private browsing hom. Raws li Adblock Plus.
• Txog IceCat: Ntxiv qhov kev cai "hais txog: icecat" homepage nrog cov kev txuas mus rau cov ntaub ntawv hais txog cov software dawb thiab kev ceev ntiag tug hauv IceCat, thiab checkboxes kom pab tau thiab lov tes taw cov uas muaj feem cuam tshuam rau cov vev xaib.
• Fingerprinting countermeasures: Fingerprinting yog cov txheej txheem uas tso cai rau kom paub qhov browser tshwj xeeb raws li cov yam ntxwv tshwj xeeb ntawm qhov xwm txheej ntawd (xws li cov ntawv sau dab tsi muaj nyob hauv lub tshuab ntawd). Tsis zoo li ncuav qab zib, tus neeg siv tsis tuaj yeem xaiv tawm ntawm kev taug qab li no; yog li tus browser yuav tsum tsis txhob muab cov lus qhia no.