I cant see them but in the code of any addon details …
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<a class="favorite widget “
data-addonid=“472577"
data-addurl=”/en-GB/firefox/collections/Ergobyt/favorites/add"
data-removeurl=”/en-GB/firefox/collections/Ergobyt/favorites/remove"
data-favedtext=“Remove from favourites"
data-unfavedtext=“Add to favourites"
title=”“
href=”#”
Add to favourites
<a class=“collection-add widget collection"
data-listurl=”/en-GB/firefox/collections/ajax/list"
data-addurl="/en-GB/firefox/collections/ajax/add"
data-removeurl="/en-GB/firefox/collections/ajax/remove"
data-newurl="/en-GB/firefox/collections/ajax/new"
data-addonid=“472577"
title=”“
href=”#"
Add to collection