alfredbaudisch, 
Clean way to open #Twitter / #X to cross post links, without having to stumble upon any Tweet or without seeing the timeline:
- #uBlock Origin
- Element Picker: highlight and click the border between side menu and timeline
- Click Create
- Now when you open Twitter it will always be plain white
- You can open the Compose URL (/compose/post), cross post and begone.
Empty, no timeline in sight.
If the Timeline appears again someday, just repeat the process to pick up the new CSS classes.
A screenshot of Twitter / X showing the timeline highlighted in red and a green circle in the border between the side menus and the timeline.
A screenshot of uBlock Origin dialog showing some cryptic CSS class names and a green arrow pointing to a "Create" blue button
A screenshot of Twitter / X showing the compose Tweet window and in the background it's just white, no Twitter timeline content.