Vivaldi (and Edge) have this absolutely wonderful capability that allows me to split one tab into two or four at the same time.
At least in my workflow it's quite useful because I usually work with several tabs open and sometimes two related tabs (say, a document I'm reading and a document I'm replying to according to that one), I know that I can perfectly have another Firefox window open next to it and fulfill that function, but I wish I could do it directly from Firefox.
Does anyone know of an add-on that fulfills this purpose? Or maybe a dev who is developing it?
Why do you mention edge? Why would microsoft remove it?
Edge uses pieces of Chrome, so it will probably have the same WEI stuff unless MS chooses to remove it. Given the goals of MS probably aligns more closely with Google than other browser makers I think it's likely edge will have WEI.