How to make Highlighted links color permanent?
Simply, for example, in Wikipedia, I clicked a link in their page to a different page, then that link would have been highlighted as "has been selected or clicked" with different color (in this case: purple), while links not have been clicked before are in blue. The problem is after a few week, the links the I have previously visited before which should have been in purple turned blue again indicating that that I have not visited this link before (but I already have). This seemingly seems like the cache have been reseted or cleared. But I have not cleared any cache. This could also be that the cache is full but I have not set any limit on the amount of content. So my question is, how do I ensure that the link that have been visited remain highlighted permanently for the font color so that I do not make the mistake of visiting the linked page again?
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The link color is based on the link being in History, which doesn't require you to actually have the page cached. While Firefox can't store an indefinite amount of history, it sometimes retains a record of visited pages for more than six months.
If you look at your History in the Library dialog, does it cut off after a certain time? Either:
- Ctrl+Shift+h
- History > Show All History
By the way, are you using the regular nightly or the UX nightly?
Note that your System Details List shows that you have obsolete, no longer supported, preferences from previous Firefox versions.
You can delete the prefs.js file and possible numbered prefs-##.js and user.js files to reset all prefs to the default value or reset these prefs to the default value via the right-click context menu on the about:config page or edit the prefs.js file and remove related line(s).
Your System Details List also shows that you have a user.js file in the profile folder to initialize some prefs on each start of Firefox.
The user.js file is only present if you or other software has created it, so normally it wouldn't be there. you can check its content with a plain text editor if you didn't create this file yourself.
The user.js file is read each time you start Firefox and initializes preferences to the value specified in this file, so preferences set via user.js can only be changed temporarily for the current session.