The new UI started to display all items in the popup windows at once, that is very bad for the window opening performance because the browser spends a lot of time rendering 2000+ items at once!
Could you please add an option to not render all items on the popup windows open event, but keep the list empty (only matched items + favorites) and start rendering other items only when some string is entered in the search box?
Hello @Murz
They are working on modifying this behavior, i.e. allowing hiding the “all” items. It’s not in v2024.12.4 yet.
The Vault view in the old UI only displayed items not assigned to any folder, and if the number of such items exceeded 100, the Vault page instead displayed a folder named “No Folder”. This was to prevent performance issues when loading the extension’s Vault view. Apparently, this lesson was completely forgotten when the new UI was designed.
Thanks, waiting for this feature, but still even not in v2025.2.0 
As I understand it, @Neuron5569 was speaking of the possibility to collapse the “All items” section (and the “Favorites” section).
On my Firefox extension 2025.2.0 that does work (in the following screenshot, the Favorites and All items sections are “collapsed”):
I can collapse and expand the “All items” section even in Firefox in the current version.
But it doesn’t affect performance at all! All items are still loaded (spending CPU time on loading) but just not shown in UI.
The idea is that we just do not need to spend CPU time on adding all 1000+ items to the popup window in the collapsed mode at all, but load them only on demand, when the user clicks on the “Expand” arrow.
@Murz As your first post already sounded more like a Feature Request (FR), I changed this now to a FR (from “Ask the Community”).
For that, I changed the title from “Very slow performance of the new browser extension popup because of all items rendered” to “Option to not render “All items” - to improve the performance of the new browser extension”.
