Nice work, but it looks like not all the subscriptions are available in list in the left column, just recent active or updated.
Also, had to clean browser cookies - all tabs got erased.
Missing drag-n-drop items to categories, but that's not critical
ps. mozilla browser

Works and does not cost anything just want to know though how to backup my settings so I can carry over to another browser.

It does not always work. However, I believe there is no wonderful extension like this. Continue your great work.

Очень полезное дополнение, удобно и понятно можно рассортировать подписки по категориям, если их много. Имеются проблемы при скроллинге, и неудобно выходить из режима настроек.