If you need to update Magento 2 Facebook Pixel by Magefan, please follow the steps below.

Note: the updating instructions depend on the method the Facebook Pixel extension was installed with.

Update using composer

If the Facebook Pixel module was installed via the composer (check if vendor/magefan/module-facebook-pixel folder exists), then you need to run these simple CLI commands in Magento 2 directory:

composer remove magefan/module-NAME
composer require magefan/module-NAME ^x.x.x
# replace NAME with:
# facebook-pixel - for Basic plan
# facebook-pixel-plus - for Plus plan
# facebook-pixel-extra - for Extra plan
# replace x.x.x with the version you want to use
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy

If you want to upgrade to Plus or Extra, check this guide on how to upgrade Facebook Pixel plan.

Update using archive and FTP

If the Facebook Pixel module was installed via FTP (check if app/code/Magefan/FacebookPixel folder exists), then follow these commands:

1. Download the latest version of the Facebook Pixel extension archive from magefan.com.

2. Extract archive.

3. Make the backup copy of the app/code/Magefan/FacebookPixel, app/code/Magefan/FacebookPixelPlus and app/code/Magefan/FacebookPixelExtra folders on your server and then remove them.

4. Using FTP, copy the app and lib folders from the archive to your Magento 2 Directory. 

magento 2 Extension Installation

5. Run update CLI commands in Magento 2 directory:

php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy

Note: if you don't want your website to be down during deployment, try these zero downtime deployment commands for Magento 2.