Форум поддержки Firefox

Since my most recent upgrade of Firefox (to 58.0.2 as stated), I am getting the yellow bar across the top of the page with the "web page is slowing down your browser" message almost any time I load a new page.

I do have a large number of tabs open, but far fewer than I did in previous versions, where I might have had 3 windows open with multiple tabs in each.

I do have a relatively slow PC and extremely slow internet (~300kB/s), which might help explain the problem, but it is definitely noticeable that I am seeing this bar far more often than ever before, even while doing less with the browser.

I use NoScript and I notice that it does tend to happen more often on pages with trusted scripts, making me suspect Java is part of the problem as well. In the past I would occasionally get the message about a script on the page slowing things down - I haven't seen that since, so I guess this is the replacement message for that?

Does anyone have any tips on what to do? If nothing else, can I turn off this alert or tweak how quickly it triggers? I almost never want to hit anything other than Wait.

Thanks in advance for your help!

This has started suddenly, yesterday. I have not changed my pattern of usage. The problem occurs on multiple sites. It occurs even with just one tab open. I have minimal add-ons running; but in any event I haven't changed them. I have a fast and stable broadband connection. The problem does not occur with IE. Windows 7, 64bit, latest Firefox (58.0.2).

Hi, Since version 58.0.2 (64 bits) of Firefox under Windows 10, the profiles I open via the profile manager ("...\firefox.exe" -no-remote -p) are very slow to load web pages. Not every pages appear to be affected, but all Google services for example are very long to open, showing the message "A web page is slowing down your browser, what do you want to do, wait or stop it". On the other side, when open without the profile manager (this time via "...\firefox.exe"), each profile works normally : the loading speed of the web pages is correct.

I tried to create desktop shortcuts to each profile as a work around, but this opens a second instance of the already open profile and not the one targeted by the shortcut (zumaxb described the same problem here : https://support.mozilla.org/fr/questions/1205523#question-reply ).

Thanks for your help.

Last night after using Firefox for years I started experiencing extremely slow response time on most sites. Kept getting a message "A web page is slowing down your browser. What would you like to do?" The sites work fine on Internet Explorer. So I know it is an issue with Firefox.

I tried so many things and has been very frustrating. After uninstalling and reinstalling several times and trying various things I believe I was able to troubleshoot possible cause but don't know why it is happening. If I reinstall and bring up Firefox the pages work fine. For many years I have been using Profile Manager option of Firefox to run multiple sessions. Now after setting up a profile, if I open the profile session this is when the slowness occurs. This has never happened in the past, never!! I could run 1 session or multiple and never had an issue. Now if I run one or more sessions I get the slowness and no response from many sites, which are working fine on other browsers.

PLEASE HELP!!!!

Sometime after around Feb 13th, I think I might have rebooted for a Windows update and now Firefox pages completely lock up until the entire page loads.

To be more specific, I can still switch tabs, open menus, etc... but I cannot interact with anything on the page itself like click links, type in text fields, right click to get the context menu... but if I switch to another tab, I can interact with that page just fine. In addition, while the page is frozen like that, I can't use the back button either, but clicking it (or using the back button on my mouse) will make the browser go back only after the page fully loads.

Why is this bad? Some pages can take 10 to 20 seconds or even more to load! So even though I can see the link I want to go to almost immediately, I have to wait until every picture is done loading before I can click it.

In addition, things like the dropdown you get on google as you type in the search box will freeze the page when you select them. For example, I go to google, I type "Firef" then click the Firefox autocomplete. The entire page freezes for a couple of seconds before the screen is cleared and goes white and then it starts loading the next page.

Other things I've noticed, those google captcha things where you click the checkbox for "I am not a robot"; those can take over 15 seconds to load and freeze up the page PLUS clicking the checkbox ALSO freezes the page again for another 15 seconds.

This happens in safe mode too and with all addons disabled.

For no reason, a few days ago I suddenly started having a problem with the message "A website is slowing down your browser. What would you like to do?" I tried everything suggested on any site which Google listed for this issue.

The page: https://support.mozilla.org/en-US/questions/1138132 mentioned something about Adobe Flash. That solution didn't work but it did prompt me to check my Firefox plugins. Once it I did, I saw that it said that the Shockwave Flash plugin (ver 27.0.r0) was out of date since it posed a security issue. I installed the latest Shockwave Flash (28.0.r0) and the Firefox messages stopped appearing (and YouTube seems to be running faster than ever). Problem solved me at least.

If anyone else is having this problem, you might want to check out your Adobe Flash plug-in to see if its out of date.

Btw, Mozilla has it set up so that a thread can only be replied to if you're registered with Mozilla support (which is understandable)......but the ONLY way they will let you register with them is by first posting a question. Duhhh -- that makes NO sense So Mozilla, what if you aren't registered but you DO have a solution to other people's questions (such as my case)?

Firefox is slow loading certain websites after updating to the latest version (58.0.2). I get an error message at the top reading "a web page is slowing down your browser" when trying to load websites e.g. youtube, tumblr, paypal, facebook, hotmail etc.

I read through the help article regarding this (https://support.mozilla.org/en-US/kb/fix-problems-connecting-websites-after-updating) and have tried clearing the cache and cookies, starting in safe mode and refreshing firefox, none of which worked. I read that it could be related to Avast firewall but I had no idea how to go about tweaking that for firefox.

This problem does not occur with when using another browser (e.g. Google Chrome/Microsoft Edge). In fact, I had this error while trying to write this question.

Any suggestions?

I run two profiles at the same time using -no-remote (then I open About:Profiles and load the second profile). Recently, the second profile is super slow to load pages. Even something like trying to copy and paste a line of text on a page can take a while.

Here's the catch: It doesn't matter which profile is #2. My two profiles are named Default and New. I thought maybe something was up with New Profile, so I set that one to default (and Default profile had to be opened via About:Profiles). When I did this, the one named Default was the one that ran slowly.

So basically, whatever profile I open first runs great. The one I open second has the problem.

I'm using 58.0.2 on Windows 10. I don't have any issue with memory (I can have multiple streaming video services running at once without an issue).

Hi. I'm beginning to constantly get the message "A web page is slowing down your browser". Comes up when I'm browsing Ebay, Facebook and just one tab open.

I have a fairly old laptop, Acer 5315, made I think for Windows7. I have just 2Gb of Ram installed. I'm running FireFox version 58.02.

Windows10 was making my PC unusuable, so I went and installed Windows7, so I now have a dual boot system. The change to Windows7 has made a big difference. Indeed, last week when I made the change to Windows7, browsing was just fine. But now browsing is "sticky". As far as I know, I should be having a problem free browsing expereince, even with my fairly old laptop. Things were OK last week.

All my Fiorefox profiles are on a dedicated partition. I have several User Accounts on my PC. They are not people, my User Accounts have names like Hobbies, DIY, Legal etc. Now, I use the same Firefox profiles acrss the PC Accounts. So, when I'm in User Account named say "Hobbies", my Firefox Profile called Shopping reads the files (profile files) in a folder called FIREFOXPROFILE-SHOPPING. If I'm in User Account called "Legal", again my Firefox profile for Shopping is set to read the files in the folder FIREFOXPROFILE-SHOPPING. That's my setup.

I've been using a profile manager where you add "-profilemanager" to the end of the command string, which you see when you look at properties in the program shortcut.. But, this morning I went and downloaded the Advanced Profile Manager app.

What I see is, that one of the names (i.e. profile names) in fact Shopping, is marked "Default". All of the profiles I have are marked "Locked". Now, when I try to do anything (like backup or open a profile), I get this message: "Profile X appears to be in use, performing this operation may produce a corrupted profile or have other harmful effects. Continue?" NB: X is whatever profile I have selected, i.e, default, Shopping etc).

.I'm hoping that I can manage to trace why I'm getting the message "A web page is slowing down your browser". Thanks. Rich

Websites load a snails pace. Gmail takes about a minute load. Simple browsing of other websites results in yellow "a web page is slowing down your browser" error bars. Other browsers are working properly. I have already tried a tune up "refresh firefox".

Hi, I'm having a problem with my Firefox loading major websites like Gmail, Facebook etc.. The loading time of these just went terribly slow... And when a webpage like these is finally displayed, it still keeps loading for a very long time, and navigation the page itself is very laggy. For example, if I type in a simple search query for a Google-search in my URL-Bar, when I hit Enter it takes more than 7 seconds until the results are displayed..! And even after that, the page is still loading for a few seconds. Strangely it works fine in other browsers.

I already tried the following approaches: - Reinstalling Firefox and deleting all Mozilla-related content in AppData - Using Firefox in Safe Mode with diabled add-ons - Disabling and Enabling the hardware acceleration - Disabling and Enabling access for accessiblilty services

After reinstalling and restoring my basic browsing data through Sync it works fine, until I start Firefox for the second time. It's the first time I encounter a problem like this. Any ideas?