[Bug 1913570] [NEW] Firefox not opening file chooser dialog for importing certificates

[Ronald Huetter]

Public bug reported:

When installed as a snap, firefox won't open the file chooser dialog for
importing a certificate authority. However, it is working when installed
using apt.

How to reproduce:
1. Install firefox as snap
2. Navigate to Preferences | Privacy & Security | Certificates | View Certificates
3. Select Authorities
4. Click Import ...
   -> A file selector dialog should open to import a certificate, but nothing happens.

Environment:
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu55
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: Budgie:GNOME
Date: Thu Jan 28 11:43:55 2021
DistroRelease: Ubuntu 21.04
InstallationDate: Installed on 2021-01-15 (12 days ago)
InstallationMedia: Ubuntu-Budgie 21.04 "Hirsute Hippo" - Alpha amd64 (20210115)
ProcCpuinfoMinimal:
 processor	: 3
 vendor_id	: GenuineIntel
 cpu family	: 6
 model		: 42
 model name	: Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz
 stepping	: 7
 microcode	: 0x2f
 cpu MHz		: 3701.000
 cache size	: 8192 KB
 physical id	: 6
 siblings	: 1
 core id		: 0
 cpu cores	: 1
 apicid		: 6
 initial apicid	: 6
 fpu		: yes
 fpu_exception	: yes
 cpuid level	: 13
 wp		: yes
 flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc cpuid pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx hypervisor lahf_lm pti ssbd ibrs ibpb stibp tsc_adjust arat md_clear flush_l1d arch_capabilities
 bugs		: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit
 bogomips	: 7402.00
 clflush size	: 64
 cache_alignment	: 64
 address sizes	: 43 bits physical, 48 bits virtual
 power management:
ProcEnviron:
 SHELL=/bin/bash
 LANGUAGE=en_US
 LC_ADDRESS=de_DE.UTF-8
 LC_NAME=de_DE.UTF-8
 LC_MONETARY=de_DE.UTF-8
 LC_PAPER=de_DE.UTF-8
 LANG=en_US.UTF-8
 TERM=xterm-256color
 LC_IDENTIFICATION=de_DE.UTF-8
 LC_TELEPHONE=de_DE.UTF-8
 LC_MEASUREMENT=de_DE.UTF-8
 XDG_RUNTIME_DIR=<set>
 LC_TIME=de_DE.UTF-8
 PATH=(custom, no user)
 LC_NUMERIC=de_DE.UTF-8
ProcVersionSignature: Ubuntu 5.8.0-36.40+21.04.1-generic 5.8.18
Snap: firefox 84.0.2-1 (stable)
Tags:  hirsute
Uname: Linux 5.8.0-36-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
_MarkForUpload: True

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: snap

** Tags added: snap

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https://bugs.launchpad.net/bugs/1913570

Title:
  Firefox not opening file chooser dialog for importing certificates

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