Poorly written extensions can have a severe impact on the browsing experience, including on the overall performance of Firefox itself. The following page contains many good <a href="%(url)s">guides</a> that help you improve performance, whether you're developing core Mozilla code or an add-on.
Špatnje napisane rozšyrjenja mógu pśeglědowańske dožywjenje tšašnje wobwliwowaś, teke cełkowne wugbaśe Firefox samogo. Slědujucy bok wopśimujo wjele dobrych <a href="%(url)s">rozpokazanjow</a>, kótarež wam pomagaju, wugbaśe pólěpšowaś, wšojadno, lěc źěłaśo na žrědłowem koźe Mozilla abo na dodanku.