57342 - Add "View as Text/HTML/..." option for unknown mime content-type
Addressing this issue would help a lot of power users. I think all that's needed is the capability to set somewhere (even about:config) that all unknown text/* types should be handled as internally as text/plain.
Currently I have to use Chrome w/ an extension to render a markdown file from my local filesystem. It is loaded w/ the appropriate mime type: text/markdown which according to this stackoverflow (https://stackoverflow.com/questions/10701983/what-is-the-mime-type-for-markdown) was registered as RFC7763 in March of 2016.
There is at least one firefox extension which will render a markdown file. but it never gets that far, firefox only gives the options to download or to specify an external application for the file.
There are other text/* types that it would be really nice if they were just viewable in the browser rendered as text/plain, such as those for source files (text/x-c, text/x-java-source, ...). On my system the mime type is also associated w/ the list of applications I select from in the file manager to open those files, so I want to be able to distinguish them from one another (I want to open markdown files with different applications than js source files or script files for example). I mention this because one workaround suggested was just to tag markdown files as text/plain, but I'd rather continue to use Chrome than lose the ability to distinguish the files in the file manager.
Addressing this issue would help a lot of power users. I think all that's needed is the capability to set somewhere (even about:config) that all unknown text/* types should be handled as internally as text/plain.
