Windows: '3-bar' menu button (or Tools menu) > Options.You also can check Firefox's connection settings here: For your privacy and security, don't let mystery programs linger here. Anything proxy or connection related? Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove). Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Then cast a critical eye over the list below that heading. If there is at least one extension before the next heading - 'Recommended Extensions' - please continue: On the right side, find the 'Manage Your Extensions' heading. In the left column of the Add-ons page, click Extensions. type or paste about:addons in the address bar and press Enter/Return.'3-bar' menu button (or Tools menu) > Add-ons.I suggest canceling those until we figure out the source.ĭo you use the Firefox Private Network extension in Firefox? Or a proxy add-on like Windscribe or another one? You can view, disable, and often remove unwanted or unknown extensions on the Add-ons page.

Does it occur even before Firefox starts? That would be hard to explain.

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