Use Stickers On Facebook
to add stickers to facebook posts, click the share button. to add stickers to facebook messenger, click the send button, to add stickers to facebook comments, see the steps under the sticker below

Rage Smiley Stickers

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Add Sticker To Facebook Comment
Step 1
Copy Sticker Link
Step 2
Click the Camera Icon of Facebook Comment or Chat Window
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Step 3
Paste Sticker Link into File Name then Click Open.
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