The Google Chrome browser, when you get to a site in a foreign language, itself offers to translate the page. The original build of Mozilla Firefox does not have such a mechanism. But don't change your browser just because of this. At your service, firstly, a large list of services for online translation of web pages, and secondly, an equally extensive list of Firefox add-ons that will "teach" the browser to work with these services automatically.
It is necessary
Web page URL or special add-on for Mozilla Firefox
Use any online translator. You will find several such useful addresses below. To translate an entire web page using an online service, paste its URL into the source text box or into the dedicated URL field. Select the direction of translation, click on the "Translate" button and wait a few seconds for the finished result.
Check, perhaps, in your assembly of Mozilla Firefox, Yandex. Bar is already installed - this add-on is very actively distributed on the Russian Internet. If installed, activate the Yandex. Bar panel and find on it, among other things, a tool for translating web pages (to understand the purpose of the buttons, move the mouse cursor over them and hold them until a hint appears). There is a small triangle next to this button on the right. Click on it - a menu will appear to select the direction of translation. When you find yourself on a web page, the text of which you need to translate, just click on this button on the panel, and in the browser window you will see the result made by the online translator Yandex.
Check out other translators for Mozilla Firefox as well. But keep in mind that existing extensions are not very different from each other. These differences are manifested in the degree of automation of the process (in other words, how many and what buttons must be pressed to get a finished translation) and / or in the variety of language support - not all add-ons have the ability to choose translation directions, use special dictionaries, etc. and different online translation services are used.
Check out, for example, the S3. Google Translator add-on. This addon allows you to customize fully automatic translation of individual sites of your choice. Activate this function, and when you go to any page of a selected web resource, you will immediately receive a Russian-language version of its text content. If the automation is disabled, to translate the page, you will need to click the button on the "S3. Google Translator" panel or the Alt + S key combination, or the corresponding item in the context menu. But keep in mind that the addon as of May 2012 (version 1.12) translated only into Russian and only used the Google online translator. If you need more language support, try installing FoxLingo. It is without automation - translation of web pages is carried out through the menu on the FoxLingo panel or through the context menu, but in this menu you can select almost any existing online translator and all kinds of (even exotic) language directions.