The webGL vendor is collected using the WebGL API using the following code ctx.getParameter(ctx.getExtension('WEBGL_debug_renderer_info').UNMASKED_VENDOR_WEBGL) (where ctx is a webGL context). It provides information about the vendor of the graphics driver.
https://deviceandbrowserinfo.com/data/fingerprints/attribute/webGLVendor
3672
AMD
ARM
ATI Technologies Inc.
Apple
Apple Inc.
Google Inc.
Google Inc. (0x05404C42)
Google Inc. (AMD)
Google Inc. (ARM)
Google Inc. (ATI Technologies Inc.)
Google Inc. (Apple)
Google Inc. (Google)
Google Inc. (Imagination Technologies)
Google Inc. (Intel Inc.)
Google Inc. (Intel Open Source Technology Center)
Google Inc. (Intel)
Google Inc. (Mesa)
Google Inc. (Mesa/X.org)
Google Inc. (Microsoft Corporation)
Google Inc. (Microsoft)
Google Inc. (NVIDIA Corporation)
Google Inc. (NVIDIA Corporation) #7pz9yksmUm
Google Inc. (NVIDIA Corporation) #NbhL24LYfk
Google Inc. (NVIDIA Corporation) #SoJg7htQt4
Google Inc. (NVIDIA Corporation) #udEpwF086L
Google Inc. (NVIDIA)
Google Inc. (Qualcomm)
Google Inc. (Qualcomm) #YVVCJhvoG6
Google Inc. (Samsung Electronics Co., Ltd.)
Google Inc.(NVIDIA)
Imagination Technologies
Intel
Intel Inc.
Intel Open Source Technology Center
Mesa
Mesa/X.org
NA
NVIDIA Corporation
Not available
Qualcomm
SBdTWBB1Dr
Samsung Electronics Co., Ltd.