Per the man page I have tried to launch chrome with an alternate data directory hoping to achieve separate profiles.
$ chrome --user-data-dir=~/.config/chromium_a [75336:1591778608:0129/114259.294272:ERROR:process_singleton_posix.cc(280)] Failed to create /home/astreib/.config/chromium_a/SingletonLock: No such file or directory (2) [75336:1591778608:0129/114259.294449:ERROR:chrome_browser_main.cc(1413)] Failed to create a ProcessSingleton for your profile directory. This means that running multiple instances would start multiple browser processes rather than opening a new window in the existing process. Aborting now to avoid profile corruption. [75336:-995142592:0129/114259.302586:ERROR:cache_util.cc(141)] Unable to move cache folder /home/astreib/.config/chromium_a/ShaderCache/GPUCache to /home/astreib/.config/chromium_a/ShaderCache/old_GPUCache_000 [75336:-995142592:0129/114259.302696:ERROR:disk_cache.cc(178)] Unable to create cache [75336:-995142592:0129/114259.302721:ERROR:shader_disk_cache.cc(605)] Shader Cache Creation failed: -2 I have tried this with ~/.config/chromium_a as an empty directory, and as a copy of ~/.config/chromium (which is created successfully when chrome is started without any args). Thought I would ask if this is simply a known problem before I go digging too deeply. amd64 6.6 release with syspatches and pkg updates applied as of today. Allan