piroor
commented
9 months ago This is due to the restriction of WebExtensions API: it does not allow addons to reopen tab with file: URL with different container. See TST options => "New Tabs not from Existing Tabs" => "Non-blank new tabs" and choose "(no control)" for all "Container:" options, then TST never tries to reopen file: URL tabs on your case.
Here is a solution idea: disabling the feature "reopen tab with different container" for some type URLs , to avoid such a "about:blank?" prefixed URL tabs problems. How about this idea?
raunn
Abstract
When using Firefox as a local file viewer (e.g. for PDFs) and TST is set to manage new tabs from outside Firefox, the URL will be modified after the management event, and "about:blank?" will be prepended. This breaks viewing, and a blank page is shown.
For example, if the user has their system set to open PDF with Firefox, and then opens a PDF in the system, normally (unmanaged) a new tab will appear with a URL like "file:///C:/Users/Path/To/File.pdf" . If TST is installed and set to manage those new tabs (which is the default setting) then the tab will open correctly and then get moved immediately to the managed tree location and container, and the URL will be changed to "about:blank?file:///C:/Users/Path/To/File.pdf" and it will fail to display the file. The URL must be manually edited in the resulting tab to remove the prepend before the file can be viewed.
Steps to reproduce
To demonstrate non-managed behavior, set: New Tabs Not From Existing Tabs -> Non-Blank New Tabs -> New Tab From Outside Firefox to "Open as (no control)" and repeat steps 4-5.
Expected result
Tab is opened in correct tree position and container, URL remains "file:///...", and Firefox displays the file correctly
Actual result
Tab is opened in correct tree position and container, but URL is prepended with "about:blank?" and Firefox cannot display the file
Environment