Your system information

• Steam client version (build number or date): Jun 4 2020
• Distribution (e.g. Ubuntu): Debian unstable
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

Steam is creating screenshots with the executable bit set on Linux (which doesn't make sense):

For example:

[user@♠] ~/.steam/screenshot
$ ls -l
total 6412
-rwxr-xr-x 1 user user  362596 mai 12  2019 211820_20190512175120_1.png*
-rwxr-xr-x 1 user user  331310 mai 12  2019 211820_20190512180043_1.png*
-rwxr-xr-x 1 user user 2702218 abr 18 03:30 294100_20200418033020_1.png*
(...)
-rwxr-xr-x 1 user user   92191 jun 27 14:53 677120_20200627145307_1.png*
-rwxr-xr-x 1 user user   82060 jun 27 17:25 677120_20200627172510_1.png*
-rwxr-xr-x 1 user user   70911 jun 27 18:49 677120_20200627184906_1.png*

$ stat 677120_20200627184906_1.png
  File: 677120_20200627184906_1.png
  Size: 70911     	Blocks: 144        IO Block: 4096   regular file
Device: 801h/2049d	Inode: 2231918     Links: 1
Access: (0755/-rwxr-xr-x)  Uid: ( 1000/  user)   Gid: ( 1000/  user)
Access: 2020-06-27 18:49:06.700565882 -0300
Modify: 2020-06-27 18:49:06.700565882 -0300
Change: 2020-06-27 18:49:06.700565882 -0300
 Birth: 2020-06-27 18:49:06.700565882 -0300

Steps for reproducing this issue:

1. Take a screenshot
2. See the attribs of the screenshot on disk