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opened 2026-05-05 05:15:13 -06:00 by gitea-mirror · 4 comments

gitea-mirror commented

2026-05-05 05:15:13 -06:00

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Originally created by @Lymia on GitHub (Jan 21, 2016).
Original GitHub issue: https://github.com/netblue30/firejail/issues/248

I noticed that some programs like Firefox take forever to launch under firejail, and eat up 100% of a core while launching, while test cases like "firejail bash" didn't.

I investigated a bit, and it seems that white-listing ~/.cache/fontconfig/ makes Firefox launch a lot faster. Without it, I believe Firefox's rebuilding the font cache on every startup.

Originally created by @Lymia on GitHub (Jan 21, 2016). Original GitHub issue: https://github.com/netblue30/firejail/issues/248 I noticed that some programs like Firefox take forever to launch under firejail, and eat up 100% of a core while launching, while test cases like "firejail bash" didn't. I investigated a bit, and it seems that white-listing ~/.cache/fontconfig/ makes Firefox launch a lot faster. Without it, I believe Firefox's rebuilding the font cache on every startup.

gitea-mirror closed this issue

2026-05-05 05:15:15 -06:00

gitea-mirror commented

2026-05-05 05:15:18 -06:00

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@Saren-Arterius commented on GitHub (Jan 21, 2016):

also ~/.config/fontconfig/

@Saren-Arterius commented on GitHub (Jan 21, 2016): also ~/.config/fontconfig/

gitea-mirror commented

2026-05-05 05:15:20 -06:00

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@netblue30 commented on GitHub (Jan 21, 2016):

It is already fixed in git for the next release. Thanks.

@netblue30 commented on GitHub (Jan 21, 2016): It is already fixed in git for the next release. Thanks.

gitea-mirror commented

2026-05-05 05:15:23 -06:00

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@Lymia commented on GitHub (Jan 21, 2016):

Is it? I don't see ~/.cache/fontconfig anywhere in the tree, only ~/.config/fontconfig. It's a different directory.

$ grep -r "fontconfig"
etc/conkeror.profile:whitelist ~/.fontconfig
etc/whitelist-common.inc:whitelist ~/.fontconfig
etc/whitelist-common.inc:whitelist ~/.config/fontconfig

@Lymia commented on GitHub (Jan 21, 2016): Is it? I don't see ~/.cache/fontconfig anywhere in the tree, only ~/.config/fontconfig. It's a different directory. $ grep -r "fontconfig" etc/conkeror.profile:whitelist ~/.fontconfig etc/whitelist-common.inc:whitelist ~/.fontconfig etc/whitelist-common.inc:whitelist ~/.config/fontconfig

gitea-mirror commented

2026-05-05 05:15:25 -06:00

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@netblue30 commented on GitHub (Jan 23, 2016):

OOPS! I put it in now, thanks!

@netblue30 commented on GitHub (Jan 23, 2016): OOPS! I put it in now, thanks!

gitea-mirror referenced this issue

2026-05-05 10:03:34 -06:00

[PR #180] [MERGED] add google-chrome{,-stable,-beta,-unstable}.profile #3556

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Reference: github-starred/firejail#176

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