1777458 - Set as Default Browser will create unnecessary mime xml in ~/.local/share/mime/packages/

Status: UNCONFIRMED

(Firefox :: Shell Integration, defect)

Description

[Fusion Future]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0

Steps to reproduce:

Click "Set as Default Browser"

Actual results:

Some mime xml files are created in ~/.local/share/mime/packages/

This causes Qt mime database return wrong mime type for html files (application/x-extension-html)

See also: https://bbs.archlinux.org/viewtopic.php?id=267553

Expected results:

Return text/html

Comment 1

[Negritas Sergiu, Desktop QA]

Hello I have tried to reproduce the issue using firefox 104.0a1(2022-07-12) on Ubuntu 22.04 but unfortunately I wasn't able to reproduce the issue.
Could you please answer the following questions in order to further investigate this issue.

1. Does this issue happen with a new profile? Here is a link on how to create one: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
2. Does this issue happen in the latest nightly? Here is a link from where you can download it: https://www.mozilla.org/en-US/firefox/channel/desktop/
3. Do you have any addons installed if so can you list them?

Comment 2

[:Gijs (he/him)]

Moving this to the correct component.

Comment 3

[[e-mail] (:bhearsum)]

I am also unable to reproduce this. I tried with both Ubuntu's snap build and my own Nightly, and neither made any changes to ~/.local/share/mime/packages.

Fusion, can you please provide a few more details on your setup? Specifically:

• Which distro do you run?
• Which Desktop Environment?
• Please attach the contents of about:support

Comment 4

[[e-mail] (:bhearsum)]

Closing due to lack of information. Please feel free to re-open at any time with the requested information.

Comment 5

[Fusion Future]

Which distro do you run?

openSUSE Tumbleweed 20221115
Which Desktop Environment?
KDE Plasma 5.26.80
Please attach the contents of about:support

Comment 6

[Fusion Future]

Attachment: about:support

Comment 7

[Fusion Future]

It seems those mimetype files are generated according to MimeType property in the desktop file.

Comment 8

[Fusion Future]

There are 5 files created in the directory

user-extension-htm.xml
user-extension-html.xml
user-extension-shtml.xml
user-extension-xht.xml
user-extension-xhtml.xml

Comment 9

[Robin Steuber (she/her) [:bytesized]]

I can reproduce the file creation with the setup described in Comment 5. Using the test program in the linked thread I can reproduce the issue.

I did some debugging and it seems that these files are created when we call g_app_info_set_as_default_for_extension, here.

It's not clear to me whether there is some reason that we shouldn't make this call in this situation. I don't see anything in the documentation suggesting that this shouldn't be called in any particular circumstances. I'm inclined to say that if calling GTK code is causing problems on a distribution, then it sounds like there is a problem with GTK or the distribution. Probably a bug should be filed with one of them, but I'm not entirely sure which one. I'm guessing the distribution?

Comment 10

[Robin Steuber (she/her) [:bytesized]]

Come to think of it, this could even be a bug in Qt. I'm not really sure how any of this is supposed to work.