new Firefox Nightly 57 open a new Tab, now that new Tab does appear (i removed Pocket part) then i enter something in the main Address field or the Search field inside the Symbol bar and press Enter. now the Tab does show the Reload icon, but it doesn't load anything. need to press Enter again to finally caused the Tab to load. next times, tab does load like it should. (so it only happens the first time for each tab) currently no active addons are installed because the old ones does not work anymore.