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Published
20 hours ago •
Rob--W
Rob--W
Cannot open [email protected] and others
Some Firefox XPI files do not have the "50 4b 03 04" signature that is checked for in src/lib/crx-to-zip.js and fail with an "Invalid header: Does not start with Cr24." error.
Sample: [email protected]
For reference, firefox 68.0.1-2 on Arch Linux:
$ for i in /usr/lib/firefox/browser/features/*; do echo "+ xxd -a $i | head -1"; xxd -a "$i" | head -1; done
+ xxd -a /usr/lib/firefox/browser/features/[email protected] | head -1
00000000: e1dd 0200 504b 0102 1403 0a00 0000 0000 ....PK..........
+ xxd -a /usr/lib/firefox/browser/features/[email protected] | head -1
00000000: fa4d 0000 504b 0102 1403 0a00 0000 0000 .M..PK..........
+ xxd -a /usr/lib/firefox/browser/features/[email protected] | head -1
00000000: 504b 0304 0a00 0000 0000 0000 213c 69e0 PK..........!<i.
+ xxd -a /usr/lib/firefox/browser/features/[email protected] | head -1
00000000: 8369 0000 504b 0102 1403 0a00 0000 0000 .i..PK..........
+ xxd -a /usr/lib/firefox/browser/features/[email protected] | head -1
00000000: 504b 0304 0a00 0000 0000 0000 213c b3d1 PK..........!<..
FYI, although it's extension is an xpi, the content is not like usual extension packages. Their format is described by "Jar archives optimized for Gecko" at https://searchfox.org/mozilla-central/rev/7a5022a31fff48c9ffe6524a5a0dfec9b2f4e465/python/mozbuild/mozpack/mozjar.py#525-550
Fixed in 1.6.11.
