Should be able to a tab with other tabs on different window

[sabai-battai]

If I have multiple windows of firefox open, if I click and drag a tab, I should be able to merge with tabs from other window (like Chrome)

[jscher2000]

Right now, you usually need to resize (un-maximize) at least the current window to drag and drop onto the tab bar of another window. It would be more convenient if Firefox can handle this for you rather than making you do it yourself in advance.