Selenium Firefox not adding extensions

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I'm trying to get ublock installed on Firefox with Selenium. The problem is, the extension won't load. The browser loads fine but does not add the extension.

FirefoxProfile profile = new FirefoxProfile();
profile.AddExtension("ublock_origin-1.17.4-an+fx.xpi");
FirefoxOptions options = new FirefoxOptions
{
    Profile = profile
};
IWebDriver driver = new FirefoxDriver(options);

I've seen this but I don't want to use an old version of firefox, and i haven't seen any other fix for it.

Currently using v0.23.0 of geckodriver for win64.

How can I add extensions to firefox with selenium? (without using an old version)

selenium c#
2 Answers

Try splitting out the options part, see if that makes a difference:

FirefoxProfile profile = new FirefoxProfile();
profile.AddExtension(*file path*);
FirefoxOptions options = new FirefoxOptions();
options.Profile = profile;
IWebDriver driver = new FirefoxDriver(options);
user_52964180 
FirefoxProfile profile = new FirefoxProfile();
FirefoxOptions options = new FirefoxOptions
{
    Profile = profile
};
IWebDriver driver = new FirefoxDriver(options);
firefoxDriver.InstallAddOnFromFile("ublock_origin-1.17.4-an+fx.xpi"); // Dear Wizard, this is the magic

Use Selenium 4.X and use the FirefoxDriver.InstallAddOnFromFile method instead of the the FirefoxOptions.AddExtension

user_40802260
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