right click on tab open in browser adds encoded question mark %3F, which breaks the path to the file. If I remove the added query string it works well. But I don't like this inefficient behaviour.

hello ​@Paul5EB2 ,

Just wondering, it looks like you’re working directly from a file:/// path (for example from a local or OneDrive folder),

Sometimes DW behaves a bit differently when files are opened directly from the file system instead of through a defined site.

It might be worth checking:

• if the issue still happens when the project is set up as a proper site in Dreamweaver
• and possibly when the site is located on a local drive rather than a synced folder

That could help narrow down whether this is related to the environment or something else.