Right-click options do not work for me in the feed tree on the left side, just the normal menu with Firefox options "Reload tab" etc. and several other things show up but nothing concerning Feedbro. So it is not possible to change the settings for the number of entries wanted for several feeds for example and I cannot see this setting anywhere else, the general settings only give the option for a maximum of 100 entries for feeds but no option for differentiating the entries for single feeds as far I can see

Smart as I am I think that I have found a workaround :-) Going through Statistics > Properties one gets the same window as when creating a new feed with the options for the maximum number of wanted entries etc. but is this the way meant to be ? Another option would be to delete single feeds and create them again with new settings but this would be annoying of course so the main thing "right-click does not work in the feed tree here" remains in spite of this workaround