Improve the error message when browser fails to load profiles from localhost due to permission issues

[mempirate]

Description

I use Firefox Profiler with samply, and to view the results in firefox profiler, I port forward the samply server to localhost. This used to work no problem until around 2 weeks ago. Now, when I do this, I get the following error:

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Firefox Profiler

Safari cannot import local profiles

Due to a specific limitation in Safari, ⁨Firefox Profiler⁩ is unable to import profiles from the local machine in this browser. Please open this page in ⁨Firefox⁩ or Chrome instead.

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Which is weird because I'm doing this on Chrome (Version 142.0.7444.162 (Official Build) (arm64))

┆Issue is synchronized with this Jira Task

[canova]

It looks like Chrome has added a "Local network access" permission. And it asks you when you first navigate to the profiler url with a localhost in it. Here's how it looks:

You need to click allow, so profiler can get the profile from localhost. Can you check if you clicked allow for this permission in profiler.firefox.com ?

If you clicked "block" before, you might need to go to this panel and click on the switch to turn the settings on:

Then you can reload the page and it should work.

[canova]

But also I think we should make this error more generic, since this is not a Safari only thing anymore. I believe Firefox added a similar permission.

[mempirate]

@canova that fixed it, thanks! Feel free to close this unless you want to keep it open to revisit the error message.

[canova]

Great, let's keep this issue for improving the error message. I rephrased the title.