It seems to be a problem with Ublock. If I uninstall it, the add-ons reappear and I am able to put them in the toolbar. I installed Adblock Plus instead. I do not have these problems on my PC, which has WinXP Pro SP3 and the current Firefox with the same type of Ublock. So I don't know what happened. Thank you! Read this answer in context 👍 2

Adblock Plus is the world’s most popular browser extension, and is used by millions of users worldwide. It is a community-driven open source project, and hundreds of volunteers are contributing to the success of Adblock Plus to make sure that all annoying ads are automatically blocked. It seems to be a problem with Ublock. If I uninstall it, the add-ons reappear and I am able to put them in the toolbar. I installed Adblock Plus instead. I do not have these problems on my PC, which has WinXP Pro SP3 and the current Firefox with the same type of Ublock. So I don't know what happened. Thank you! Read this answer in context 👍 2 Adblock Latitude By: Pale Moon Add-ons Team About this add-on. Adblock Latitude is a direct fork of Adblock Plus made specifically for the Pale Moon and Basilisk browsers. Adblock Latitude is designed to be a drop-in replacement for ABP and will utilize all your existing settings. However, ABL is more than that.

Jan 31, 2020 Add-ons - Waterfox Add-ons are like apps that you install to add features to Waterfox. They let you compare prices, check the weather, listen to music, send a tweet and more. Get add-ons from the following places: Archived Add-ons for Firefox: This is an archive of the Firefox add-on page when it had all add-ons available for every version. The search

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These ads might be loud video ads, ads that follow you around the web, trackers, third-party cookies, and more. To use an ad blocker, you can search for ad blocker add-ons that are available in your browser. Firefox, for example, has this list of approved ad blocker add-ons. Click on this list (or ad blockers that are approved for your browser Best Ad Blockers for Microsoft Edge in 2020 | Windows Central