How do I modify builtin #Javascript objects?
In #Firefox I can do:
Object.defineProperty(window, 'performance', { value: undefined });
but if I put it in #Greasemonkey it does nothing :(
#coding #programming #web #userscripts #privacy #paranoid
dorotaC
npub1dv…7ttxk
2026-08-22 10:23:59 UTC
Author Public Key
npub1dvsuqmzh4jsjerdszplqvxmgcxl8fwuknn7dd76m978uq2ac9t8qk7ttxkSeen on
wss://relay.ditto.pubPublished at
2026-08-22 10:23:59 UTCEvent JSON
{
"id": "b85e8ad2d5daf001b251f92a1ef8a29ba83cb337ae437ef9a5e65efabb6a9967",
"pubkey": "6b21c06c57aca12c8db0107e061b68c1be74bb969cfcd6fb5b2f8fc02bb82ace",
"created_at": 1787394239,
"kind": 1,
"tags": [
[
"t",
"javascript"
],
[
"t",
"firefox"
],
[
"t",
"greasemonkey"
],
[
"t",
"coding"
],
[
"t",
"programming"
],
[
"t",
"web"
],
[
"t",
"userScripts"
],
[
"t",
"privacy"
],
[
"t",
"paranoid"
],
[
"proxy",
"https://fosstodon.org/users/dcz/statuses/117138668891475297",
"activitypub"
],
[
"client",
"Mostr",
"31990:6be38f8c63df7dbf84db7ec4a6e6fbbd8d19dca3b980efad18585c46f04b26f9:mostr",
"wss://relay.ditto.pub"
]
],
"content": "How do I modify builtin #Javascript objects?\nIn #Firefox I can do:\n\nObject.defineProperty(window, 'performance', { value: undefined });\n\nbut if I put it in #Greasemonkey it does nothing :(\n\n#coding #programming #web #userscripts #privacy #paranoid",
"sig": "1409e79462061dcbf299ab41493f7cc20edb7dbd05ed895987c5750b3d55ac13cf4f66432c22e4f6e7886fe32b4919806d23a66cfca84a337cb634107812c2dd"
}