this post was submitted on 09 Feb 2024
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Privacy
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I pretty much instantly lose respect for people who design sites to only support specific browsers. With the exception of Firefox, it's all Chromium anyway so they don't really need to worry about it. This isn't like when Internet Explorer was a thing and broke web pages.
I'm working on an application right now that requires the ability to load and save data to the local file system. Firefox does not allow this, whereas Chrome does. The whole application runs from the local file system, so I don't think there is much of a security issue.
But I actually do is test for the existence of the function to open the save or load dialog. That way, if Firefox does implement it, Firefox will work as well.
That sounds like a huge security risk. I'm surprised any browser allows it.
All it can do is open a dialogue to load or save a file. The action must also be initiated by the user (e.g. clicking a button). It's not randomly allowing a page to load and save on its own.
But both of those are possible on Firefox?
Using JavaScript to open a save or load dialog is not possible on Firefox. It lacks the methods showOpenFilePicker() and showSaveFilePicker().
Is that a PWA? Firefox used to support it.
It is simply an HTML page with local JavaScript files. Nothing else. It has to run on as many platforms as possible, and be totally isolated from the outside world.