1. There are several ways to manually install Firefox add-ons, including downloading the extension and using the Add-ons Manager.
2. It is important to only download extensions from trusted sources such as the official Firefox Add-ons site or a Mozilla repository on GitHub.
3. To install a theme, you can use the Add-ons Manager or drag and drop it onto the browser window.
The article provides clear instructions on how to manually install Firefox add-ons and themes, which is useful for those who are unfamiliar with the process. The article also emphasizes the importance of downloading extensions from trusted sources, which is an important point that should not be overlooked when installing add-ons.
However, there are some potential issues with trustworthiness and reliability in this article. For example, while it does mention that users should only download extensions from trusted sources, it does not provide any further information about what constitutes a trusted source or how to identify one. Additionally, while it does provide instructions on how to install themes manually, it does not mention any potential risks associated with doing so (e.g., malicious code). Furthermore, there is no discussion of alternative methods for installing add-ons or themes (e.g., using an extension manager). Finally, there is no mention of any potential conflicts between different versions of Firefox and/or different types of add-ons/themes that could arise when attempting to install them manually.
In conclusion, while this article provides useful information about how to manually install Firefox add-ons and themes, it lacks sufficient detail regarding potential risks associated with doing so as well as other methods for installation that may be available.