Cannot open an HTML file stored on RAM-disk with a browser

I wrote a script that generates a PDF and an HTML file on RAM-disk: - The PDF file can be opened as expected. - The HTML file can be opened with an editor, but not with a browser. This is the error message I get from the browser (Chrome, Firefox) on Ubuntu Linux 24.04: Access to the file was denied The file at file:///dev/shm/test.html is not readable. It may have been removed, moved or file permissions may be preventing access. ERR_ACCESS_DENIED These are the file details: /dev/shm> ll -rw-rw-r-- 1 11K 2024-08-30 11:06 test.html If I copy the file to the hard disk, it can be opened as expected: /dev/shm> cp ./test.html ~ ------- If I build Chromium from source as explained here , will I be able to open files stored on RAM-disk like /dev/shm?