When i click a RSS reader icon on the homepage https://lemmings.world/ then the URL is like https://lemmings.world/feeds/front/......long string here.....xml?sort=Active
and it triggers a download, not display of my Firefox-ESR RSS reader extension (called "Brief"). Other RSS feed like one linked from sub-lemmy https://lemmings.world/c/protonprivacy@lemmy.world is displayed properly.
When I click a Brief icon in address bar of a https://lemmings.world/, then I get correctly subscribed.
When I compare subscribed feed URL with the URL of the on-page button, they are identical.
How this issue can be fixed?