I download different documents and forms to my computer and then when I try to open them I can't. I installed 'Open It', but it is not among the choices given.
I have so much trouble opening documents etc. I can't even open the folders in my Mozilla profile like my favorites. Its a JSON file. Why does Mozilla use files that I can't open?
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Wha tkind of documents are you trying to open? Do you have the relevant software for each document type?
"Why does Mozilla use files that I can't open?"
The bookmarks backup JSON files are human readable in a text program like Notepad or Wordpad. But those JSON files don't have any separate lines of numbers and text they're one long line. Those files are made to do their job in Firefox, not to be looked at by users.
What type of problem do you have that prompted you to attempt to read a file like that?