Release 4.5.0 Mostly fixes and adjustments for FF >= 133. Thanks to everybody who contributed! Features: * tabmenu.css: rework tab width for FF 133+ Fixes: * Fix Private Browsing indicator for releases > 132 (MR 70) * Esmification: Replace ChromeUtils.import by ChromeUtils.importESModule when available * Fixing urlbar popout on current Firefox Other: * README: link to IRC/matrix channel * README: update links to gitlab.postmarketos.org (MR 72) * metainfo: add missing homepage URL (MR 65) * src/common/header: update URL (MR 67, 68)