You can check all checkboxes on Ebay...
Check/Select all checkboxes on EBAY Extension
This extension adds \"Select All\" button to check all checkboxes in Ebay search filters window (because there doesn't exist).
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Source Manifest.json
{"update_url": "https://clients2.google.com/service/update2/crx", "name": "Check/Select all checkboxes on EBAY", "version": "1.1.3", "manifest_version": 3, "description": "You can check all checkboxes on Ebay...", "icons" : { "48" : "icon-48.png", "128" : "icon-128.png" }, "background": { "service_worker": "background.js" }, "content_scripts": [ { "matches": ["" ], "css": ["mystyle.css"], "js": ["myscript.js", "jquery.min.js"] } ], "action": { "default_icon": "icon-48.png" }, "permissions": [], "optional_permissions": [], "host_permissions": [\t"*://*.ebay.com/*", "*://*.ebay.ca/*", "*://*.ebay.it/*", "*://*.ebay.ie/*", "*://*.ebay.de/*", "*://*.ebay.fr/*", "*://*.ebay.be/*", "*://*.ebay.at/*", "*://*.ebay.nl/*", "*://*.ebay.es/*", "*://*.ebaysweden.com/*", "*://*.ebay.ch/*", "*://*.ebay.co.uk/*", "*://*.ebay.com.au/*", "*://*.ebay.com.cn/*", "*://*.ebay.com.hk/*", "*://*.ebay.in/*", "*://*.ebay.com.my/*", "*://*.ebay.com.ph/*", "*://*.ebay.ph/*", "*://*.ebay.com.sg/*", "*://*.tw.ebay.com/*" ], "optional_host_permissions": []}
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