ChrDr [1] filed a deletion request for firefox-extension-kwallet-kf5 [2]: The package was only needed because the addon on addons.mozilla.org produced a segfault. The recent version (1.3) does not produce the segfault and is signed (while this package produces an unsigned addon). So using the "official" addon on addons.mozilla.org is by far the better option now.
[1] https://aur.archlinux.org/account/ChrDr/ [2] https://aur.archlinux.org/pkgbase/firefox-extension-kwallet-kf5/
