Find PDF in the list and change it to the desired value.In the General panel, go down to the Applications section.Alternatively, enter about:preferences in the address bar. Click the hamburger menu button and choose “Preferences”. To enable Java content, you will have to install an old, 32-bit version of Firefox and then manually add the Java plugin.Here is how to disable the built-in PDF viewer or use the system viewer: The built-in PDF viewer in Firefox has progressed continuously since its introduction in 2013, but I still prefer using the distribution’s document viewer (Evince/Xreader/…). Disable the built-in PDF reader in Firefox If you are not satisfied with latest version, you may install Firefox older version back by getting any of its previous version APK. mousewheel.system_scroll_override_on_root_Ģ.There are a few more variables which influence the vertical scrolling speed and can be changed safely, for example: The acceleration computations create a constant acceleration effect, but this value can control the level of acceleration. : The multiplicative factor used to determine the rate of acceleration.Suggested values: 2 (accelerations kicks in really fast) to 5. This value determines whether or not acceleration computations are applied to a given scroll event. I'm trying to install an old version of Firefox from the following URL: but it's a big list of files, I can't find an install file. : The mouse wheel “click” number at which acceleration begins to take effect.If you want to lock the Firefox version, prevent it from being updated, use Synaptic “Lock Version” option. So scroll down, download the previous Firefox package and Firefox language pack (firefox-locale-xx):įinally install the previous version packages by running commands one by one: sudo apt install ~/Downloads/firefox_*.debĪnd install the language pack via command: sudo apt install ~/Downloads/firefox-locale-*.deb Lock Firefox version: Once you click the link, it brings you to the build page with the deb binary packages in the bottom. arm64, armhf, ppc64el – other devices e.g.,Rasperry Pi, Microsoft HoloLens.Check your OS type via System Settings -> About. When the web page opens, click the link under “Builds” section: All official Ubuntu packages as well as PPA packages are built and hosted in this site. Tip: is the website via Canonical Ltd., the company behind Ubuntu. Replace FULL-NAME with the one you got via previous steps. In your web browser go to web page that displays the build info of the package via URL: So the second builds may still be the latest version with different build number.įind out the first one contains the previous software version number, and copy the full name, 85.0.1+build1-0ubuntu0.20.04.1 ( will be used in next step) in the case. Thirdly select firefox package in the list and click the “ Changelog” button in the bottom.ģ.) When the changelog file opens, scroll down and find out the previous build name.ĭue to issues, the same package version may compile in several times. And the changelog file contains the info.ġ.) Firstly install Synaptic package manager if you don’t have it.Ģ.) Secondly launch the tool, click the search icon, and search firefox in pop-up dialog. To get the previous Firefox package, you have to firstly find out its full name. Then, download the required version of Firefox from Mozilla FTP archive. Get Firefox Changelog file:Ī full Ubuntu (deb) package name is usually consist of app_name + version_number + build_number + os_edition. If you just want to get back the old original version, use Synaptic via Package -> Force Version menu option.
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