The lock means that the website you’re using is encrypted, so that even if someone is watching your browsing on the network (like another person on a public WiFi hotspot), they won’t be able to see your password. { -brand-name-firefox } will try to warn you when you’re about to enter your password on an unencrypted site.
Pytko wóznamjenijo, až websedło, kótarež wužywaśo, jo skoděrowane, až njeby nichten, kótaryž wašo pśeglědowanje w seśi wobglědujo (na pśikład druga wósoba w zjawnem WLAN-hotspośe), mógał wašo gronidło wiźeś. { -brand-name-firefox } buźo wopytowaś, was warnowaś, gaž cośo swójo gronidło na njeskoděrowanem sedle zapódaś.