06-17-2022 08:50 PM
Having more vivaldi features like two level tab-stack, sidebar with the ability to add web pages, a status bar below, swipes gestures, adding a new tab picture and a more customizable interface with the same level of security in Firefox would be awesome.
09-20-2022 07:16 AM
Similar requests have been added here in the community (feel free to upvote and add your thoughts)...
Firefox Adding a two-level tab stacks like in Vivaldi
And if there are other features you think would improve the Firefox experience, submit them in the Ideas section here.