Firmware Version 1.5.0 incorporates the following fixes and enhancements:

1. Improves head detection performance to support helmets or goggles in winter sports.
2. Adds [Vehicles] selection to [Subject to detect] selection in the [AF] tab to support the detection of automobiles and motorcycles in motorsports. Adds [Spot detection] when [Vehicles] is selected as the helmet of the driver or rider.
3. Detection may not be possible for ordinary passenger cars or bicycles, or for motorcyclists performing stunts or kicking up dirt and dust.
4. Improves detection performance for eye detection when:
   • there are shadows on the face.
   • hair is hanging over the eyes.
5. Adds support for torso detection of a person. If the eyes, face or head are hidden or cannot be detected, a person's torso will be detected and tracked continuously.
6. Adds the ability to import manual white balance (MWB) data from the Quick Control screen when capturing still images.
7. Eliminates the center press operation of the multi-controller to prevent accidentally transferring images during FTP transfer.
8. Adds the ability, when using EOS Utility or Browser Remote for remote shooting with two cards inserted, to set the recording method and to select which card to be recorded to.
9. Adds [Suppress lower frame rate] to [Smooth] in [Disp. performance], enabling the shooting screen to be displayed with less drop frame rate even in dark locations.
10. Changes the default value of [FTP server] → [Passive mode] to [Enable].
11. Improves operation stability during FTP transfer.
12. Optimizes controls of In-Body Image Stabilization (IBIS) when using specific EF lenses not equipped with the image stabilization function.
13. Fixes an issue, in which noise occurs along the edges of bright subjects when using Canon Log for movie recording.

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Firmware Version 1.4.0

1. Adds [Canon Log 3] to [Canon Log settings].
2. Simultaneous movie recording on card 1 and card 2 has been added.
3. Improves operation stability when using the RF400mm F2.8 L IS USM and RF600mm F4 L IS USM.
4. Fixes an issue in which, during HDMI connection, if the camera's screen turns off, a zebra pattern is displayed via the HDMI output.
5. Fixes an issue in which sufficient image stabilization effects may not be attained immediately after the start of shooting.

Download firmware v1.4.0 for the Canon EOS R6

EOS R6 -- Firmware Version 1.3.0

1. Added low bitrate recording option
2. Electronic Full-time Manual Focus
3. FTP Transfer Status Display
4. Fixes a phenomenon, in rare cases where the camera does not function normally when the drive mode is set to "High-speed continuous shooting" to shoot still images continuously.
5. Fixes a phenomenon, that may corrupt the image displayed in the electronic viewfinder.

https://asia.canon/en/support/EOS%20R6/model

LIM'S Design Case

Canon EOS R6 firmware 1.1.1

1. A messaging is displayed when [HDMI display: Camera+External monitor] and [Overheat control: on] settings are both enabled.
2. When the RF100-500mm F4.5-7.1 L IS USM is attached, an image stabilization effect of approximately six stops* is achieved through collaborative control with the in-lens image stabilization. *Focal length 500mm, Based on CIPA(Camera & Imaging Products Association) standards.
3. Fixes a phenomenon in which the IS capabilities may be degraded when performing continuous shooting in cases where the RF100-500mm F4.5-7.1 L IS USM lens is attached to the EOS R6 running firmware version 1.1.0.
4. When using certain RF lenses for movie shooting, the in-lens image stabilization mechanism has been improved.
5. Fixes a phenomenon in which the "Slow Synchro" setting screen is not accurately displayed, when the language is set to English.
6. Fixes a typo displayed on the communication setting screen, when the language is set to Korean.
7. Connectivity during FTP transmission has been improved.
8. Temperature detection and shooting time control in video shooting have been improved. In addition, the total shooting time when the short-time recording and power-on/off are performed repeatedly at room temperature is improved.
9. The phenomenon in which the movie recording time available is not correctly displayed when the Date/Time/Zone is not set has been corrected.

https://www.canon.co.uk/support/consumer_products/products/cameras/digital_slr/eos-r6.html?type=firmware&firmwaredetailid=tcm:14-2011538&os=macos%2010.14%20%28mojave%29&language=

There is only one thermal pad and none at all on the main processor, because Canon is not worried about it getting warm.