My Add-On https://addons.mozilla.org/en-US/firefox/addon/עع-aynayn-lookup-former-עع-con/ has been removed from the public list.
While the Add-On is not compatible with recent Quantum Firefox (and I have no time now to rewrite it completely for Quantum), there are users wanting to use it with an old style Firefox or with any compatible browsers such as Waterfox. Could you, please, return the Add-On to the public list?
Legacy extensions are no longer supported by Firefox and thus also no longer available on AMO. You can find more details at https://blog.mozilla.org/addons/2018/08/21/timeline-for-disabling-legacy-firefox-add-ons/
There are some archiving projects that may have grabbed the XPIs off AMO if you don’t have them anymore yourself.